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Case notes on veterinary investigations in sheep, cattle and other species


SHEEP

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Abomasal emptying defect of sheep | Posted March 2012
Written by: Colin Peake, Riverina Livestock and Pest Authority, Hay and Patrick Staples, NSW State Veterinary Diagnostic Laboratory, Menangle
Abomasal emptying defect is an idiopathic syndrome of abomasal distension and impaction described in Suffolk and Hampshire sheep primarily ... Read More

Acidosis in dorper ewes on pasture | Posted May 2016
Written by: Judy Ellem and Heidi Austin, North West LLS, Tamworth and Kate New-Tolley Veterinary Student, Charles Sturt University
In North West NSW in late April and early May 2015, three cases of lactic acidosis and one suspected case were seen in Dorper ewes on pasture with no history of grain feeding ... Read More

Acute post drenching mortality in lambs | Posted July 2013
Written by: Brigit Pitman, District Veterinarian, Hume LHPA
A mob of ewes and lambs were yarded for drenching and weaning. One thousand one hundred lambs were drafted from the ewes and eleven lambs died within 12 hours of drenching ... Read More

Adverse reaction to Tetravet flexi-dose Oxytetracycline PVP injection | Posted June 2011
Written by: Tony Morton , DV, Hume LHPA
With the withdrawal of penicillin/streptomycin from the market there has been a move to the use of long-acting tetracyclines ... Read More

Age, liveweight and immunity of lambs to worms | Posted July 2012
Written by: Susan McClure, DV Central West LHPA
Lambs frequently fail to develop protective immunity to gastro-intestinal nematodes resulting in direct losses from mortality and decreased production, and indirect costs associated with treating ... Read More

Anthelmintic resistance survey in the Central West LHPA | Posted April 2013
Written by: Evelyn Walkera, Neil Charmanb, Jillian Kellya, and Susan McClurea
a. District Veterinarian, Central West LHPA, Dubbo
b. Veterinarian, Pfizer Animal Health Australia

Internal parasites are ranked the highest costing disease in the Australian sheep industry followed by flystrike, lice, and post weaning mortality ... Read More

Anthrax outbreak at Bourke | Posted March 2011
Written by: Brian Hodge, District Veterinarian South East Livestock Health and Pest Authority, Cooma
Anthrax occurs in a belt of country which extends from a line between Albury and Tocumwal on the Murray River, northwards through Narrandera, Condobolin, Nyngan and Bourke ... Read more

Aortic rupture (spontaneous) in Dorper ewes | Posted July 2013
Written by: Bill Johnson, District Veterinarian, Tablelands LHPA, Goulburn
Spontaneous rupture of a major blood vessel is an uncommon cause of sudden death in grazing livestock. This report describes two sheep in a flock which died suddenly on the same day ... Read More

Arcanobacterium pyogenes pneumonia in lambs | Posted March 2013
Written by: Mandi Carr, District Veterinarian, Tablelands LHPA
Pneumonia is the single greatest cause of deaths in sheep. Nursing lambs and lambs 5-7 months of age have a higher incidence than animals in other age groups ... Read more

Arthritis in sheep | Posted August 2010
Written by: Bruce Watt, District Veterinarian, Central Tablelands RLPB
Infectious arthritis is a common problem in young Australian sheep and ... Read More


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Barbervax: Potentially a new tool for the control of barber’s pole worm of sheep | Posted April 2013
Written by: Smith, W.D*., Newlands, G.F.N*., Fitzpatrick, J.L*, Dobson, R.# and Besier, B+.
*Moredun Research Institute, Pentlands Science Park, Edinburgh, UK.
#Murdoch University, Western Australia.
+Department of Agriculture and Food Western Australia, Albany WA.

An application is about to be submitted to the Australian Pesticide and Veterinary Medicines Authority (APVMA) seeking authority to launch "Barbervax", a novel vaccine to aid in the control of Barber’s pole worm ... Read More

Bone problems in lambs on grazing cereals | Posted August 2008
Written by: Bruce Watt, District Veterinarian, Central Tablelands RLPB
Lambs are reported to develop skeletal problems due to calcium deficiency, internal parasitism, copper deficiency... Read More

Bacterial rhinitis in merino ewes | Posted May 2007
Written by: Eliz Braddon, District Veterinarian, Young RLPB
Severe nasal discharge with swollen nasal planes and upper lip, combined with ... Read More

Bloat on faba beans in weaned lambs | Posted: October 2010
Written by: Gabe Morrice, District Veterinarian, Riverina LHPA
A trail of faba beans to get the lambs into the yards, followed by a big drink of water leads to losses ... Read More

Bloat, frothy, in sheep | Posted October 2010
Written by: Ian Masters, Hume LHPA and Bruce Watt, Tablelands LHPA
This report details two cases, one confirmed by autopsy ... Read More

Blowfly strike waves: Biology and control | Posted March 2011
Written by: Peter James, Queensland Alliance for Agriculture and Food Innovation (QAAFI),
University of Queensland

L. cuprina is by far the most important fly strike species, responsible for more than 90% of strikes. Brown blowflies (Calliphora spp.) can cause strikes in cooler weather in some areas and are often the species involved in wound strikes ... Read more

Brachygnathia, cardiomegaly and renal hypoplasia syndrome in poll merino lambs | Posted August 2010
Written by: Peter Windsor, Faculty of Veterinary Science, University of Sydney
A poll merino breeder reports episodic freak lambs with a poor survival rate ... Read More

Branhamella ovis and Chlamydia pecorum isolated from a case of conjunctivitis (with some polyarthritis) in lambs | Posted April 2013
Written by: Evelyn Walker, District Veterinarian, Central West LHPA, Dubbo
The eye lesions consisted of bilateral conjunctivitis, an ocular discharge ranging from clear to yellow, yellow crusts, and swollen conjunctivial membranes with or without hyperaemia ... Read More

Brucella ovis as cause of abortion | Posted March 2016
Written by: Rahul Shankar, DV Young and Jillian Kelly, DV Coonamble
A producer noticed several aborted fetuses about his lambing paddock, stocked with 3-4 year old ewes. ... Read More


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Campylobacter abortion in sheep | Posted April 2017
Written by: Rahul Shankar, District Veterinarian, Riverina LLS, Young
Making a definitive diagnosis of campylobacter abortion can often prove difficult as animal health staff are often told about the issues at a time when testing is not worthwhile when owners notice abortions/perinatal deaths but only began investigation around marking or weaning time ... Read More

Case of colloid goitre in a second cross lamb | Posted May 2016
Written by: Effie Lee, State Veterinary Diagnostic Laboratory, EMAI, Menangle and Bruce Watt, Central Tablelands LLS, Bathurst
A sheep producer from a property about 30 km south west of Bathurst found a single second cross lamb with a massive swelling of the ventral neck. The lamb survived for two days but then died ... Read More

Case of lupinosis | Posted December 2012
Written by: Eliz Braddon, SDV Lachlan LHPA
An owner was confronted with 30 dead sheep and at least that many staggering and apparently blind out of 1000 two-year old Merino ewes ... Read More

Case of scabby mouth in lot fed lambs | Posted October 2013
Written by: Brigit Pitman, District Veterinarian, Hume LHPA
In March 2013 Scabby Mouth spread through 1500 crossbred lambs shortly after they were introduced into an on-farm feedlot. Around 50% of lambs in all five pens were affected with lesions at the height of the outbreak ... Read More

Case of the sheep with missing ears | Posted June 2015
Written by: Bob McKinnon, Regional Veterinarian, North West Local Land Services, Tamworth
"We were contacted by one of our local sheep farmers regarding a number of sheep that had lost their ears. He believed he had lost up to 50 sheep and had counted 35 bodies" ... Read More

Chlamydial infection in sheep | Posted March 2011
Written by: Bruce Watt, SDV, Tablelands Livestock Health and Pest Authority
Chlamydia pecorum is a well know cause of polyarthritis in lambs especially rapidly growing weaned prime and British breed lambs. However, C. pecorum is implicated in keratoconjuctivitis ... Read more

Chlamydia serological study in a commercial sheep flock | Posted March 2016
Written by: Evelyn Walker, District Veterinarian Central West LLS (Dubbo) and Assoc. Prof. Adam Polkinghorne, Centre for Animal Health Innovation, University of the Sunshine Coast
Chlamydia pecorum, commonly isolated from the gastrointestinal tract, is ubiquitous in livestock globally. In sheep it is mainly associated with keratoconjunctivitis and polyarthritis but also implicated in respiratory disease, abortions and enteritis ... Read More

Chronic fasciolosis with aberrant mature fluke | Posted April 2013
Written by: Bruce Watt (Tablelands Livestock Health and Pest Authority) and Patrick Staples (State Veterinary Diagnostic Laboratory, Elizabeth MacArthur Agricultural Institute, Menangle)
Over the past three months, two of five mature White Suffolk rams died after losing weight. Most of the cohorts had also lost weight and appeared lethargic. They had grazed low-lying wet paddocks during joining in the summer ... Read More

Closantel toxicity in crossbred lambs | Posted September 2016
Written by: Bruce Watt (Central Tablelands Local Land Services, Bathurst) and Erika Bunker (State Veterinary Diagnostic Laboratory, EMAI, Menangle)
Anecdotally, closantel intoxication causing a low prevalence of death and blindness is occasionally encountered by sheep producers on the central tablelands of New South Wales and elsewhere ... Read More

Clostridium sordellii, A traditional and emerging pathogen | Posted February 2015
Written by: Bruce Watt, Local Land Services, Bathurst and Patrick Staples, State Veterinary Diagnostic Laboratory, Menangle
Clostridium sordellii is one of the anaerobes responsible for malignant oedema, a wound infection of sheep, cattle and other species that develops in the subcutaneous fascia and causes an acute fatal toxaemia ... Read More

Coccidiosis infection in merino lambs post weaning | Posted July 2012
Written by: Steve Eastwood - Senior District Veterinarian, New England LHPA
In March 2012 a stud/commercial Merino operation experienced scouring in a mob of commercial Merino lambs ... Read More

Colitis typhlitis in weaned lambs | Posted August 2007
Written by: Dan Salmon, District Veterinarian, Riverina RLPB
Investigates two incidents of haemorrhagic enteritis following transport of weaned lambs over long distances ... Read More

Contagious ecthyma (scabby mouth / orf) in young rams, an unusual presentation | Posted December 2012
Written by: Libby Guest, District Veterinarian, North West LHPA
The rams did not have the typically lesions affecting the mucocutaneous junctions of the mouth and nose but had hyperkeratotic, proliferative papillary projections on the ears and dorsal cranium ... Read More

Crystal assocated cholangiopathy (Yellow Big Head) in lambs grazing Tribulus terrestris | Posted July 2013
Written by: Greg McCann (Central West LHPA, Dubbo)
A mob of 340 6-8mo cross bred lambs were grazed on a canola stubble paddock in February after receiving 50mm of rain some 6 weeks previously. Two days after introduction, a couple of lambs were noted as hanging back ... Read More


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Dermatosparaxis in a white dorper flock | Posted March 2012
Written by: Jillian Kelly, District Veterinarian, Central West Livestock Health & Pest Authority, Coonamble & Nyngan
Dermatosparaxis is an inherited connective tissue disorder that results in the deposition of abnormal collagen in the skin, leading to the skin losing its strength, and becoming fragile ... Read More

Disease control to improve sheep carcase and carcase parts yield | Posted April 2017
Written by: Kate Wingett, Margaret Allman-Farinelli and Robyn Alders, University of Sydney
The ABS only publish data on livestock products that are passed for human consumption, leaving an undetermined but significant quantity of nutrient-dense, energy-dense sheep meat and offal condemned in processing or used as animal feed ... Read More

Dorsal skin lesions after ram shearing in far northwest: a complex aetiology | Posted March 2012
Written by: Greg Curran, Veterinary Officer, DPI, Broken Hill
While testing for ovine brucellosis in two ram flocks in Far Northwestern NSW in December 2011, a high prevalence of back lesions was observed. The lesions varied from severe to trace, with some rams not affected. The lesions involved loss of wool and skin, with some crusting ... Read More

Drench resistance on the northern tablelands | Posted April 2013
Written by: Andrew Biddle, New England LHPA (Glen Innes)
Resistance to anhelminthics is not a new phenomenon and starts the very first time a drench is used. In fact, the only way not to select for drench resistance in sheep is not to drench them at all ... Read More

Drench resistance survey - Lachlan LHPA | Posted March 2012
Written by: Eliz Braddon, SDV Lachlan LHPA
Within the Lachlan LHPA there is increasing concern, real or perceived, amongst ratepayers that the highly expensive anthelmintics they are using are failing to adequately control these parasites ... Read More

Drought lot Listeria abortions and some unexpected other diseases | Posted March 2012
Written by: A G Morton, District Veterinarian, Hume Livestock Health and Pest Authority
A series of drought years had degraded the lucerne based pastures on a property north of Wagga Wagga. As a result the sheep enterprise relied on stubbles for summer feed and drought lots in late autumn utilising pea and canola pit silage and grain ... Read More

Dystocia in maiden Dorper ewes | Posted September 2011
Written by: Derek Lunau, DV Moree
Dystocia is a common problem in lambing ewes. A definition of dystocia is lambing which takes more than one hour after rupture of the foetal membranes ... Read More


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Enzootic ataxia | Posted March 2011
Written by: Judy Ellem, DV Coonabarabran
A staggering syndrome with deaths occurred in a flock of cross-bred ewes and lambs on the western edge of the Warrumbungle Mountains ... Read more

Epidemiology of gastrointestinal nematodes in sheep grazing irrigated summer pastures | Posted March 2012
Written by: Dan Salmon, SDV Deniliquin
The epidemiology of gastrointestinal nematodes in summer rainfall and winter rainfall and even the uniform rainfall area has been fairly well described. This paper is a belated report on trial work done many years ago ... Read More

Eradication of ovine brucellosis in Dorpers | Posted October 2013
Written by: Tahleah Haddow, Veterinary Student, Charles Sturt University, Wagga Wagga Dermot McNerney, Senior Veterinary Officer, NSW DPI, Dareton
Historically the producer tested annually for ovine brucellosis and had found no evidence of infection for several years but testing had been neglected...the owner confirmed finding several rams (also dorper) from his neighbour on his property several months before ... Read More

Erysipelas arthritis in crossbred ewes | Posted August 2007
Written by: Bruce Watt, District Veterinarian, Central Tablelands RLPB
A case of poor performance in a ewes flock that culminated in severe arthritis and ... Read More

Ethics of grazing livestock—a brief overview | Posted June 2015
Written by: BR Watt, Tablelands Livestock Health and Pest Authority (now Central Tablelands Local Land Service), Bathurst NSW
While those who consider that animals have similar rights to people will always regard livestock production as unethical, those of most other philosophical persuasions can accommodate grazing livestock provided welfare is guaranteed ... Read More

Exertional rhabdomyolysis in ewes | Posted July 2013
Written by: Elizabeth Braddon, SDV Lachlan LHPA
Many animals such as horses, pigs and various species of wildlife suffer from exertional rhabdomyolysis or capture myopathy - but it is not normally encountered in sheep. This is a case report in which 10 of 600 ewes died after being harassed by dogs ... Read More


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Fatal intestinal torsion in a ram post-shearing | Posted October 2013
Written by: Brigit Pitman, District Veterinarian Hume LHPA
An unexpected death in a ram after sedation and shearing was investigated to determine the cause of death, the diagnosis at autopsy was that death was due to intestinal torsion ... Read More

Field gastrointestinal worm count in sheep and goats | Posted April 2017
Written by: Bill Johnson, South East LLS, Goulburn
With practice, a field total worm count adds less than ten minutes to a routine autopsy, far less time than to collect and submit laboratory samples, and requires minimal equipment ... Read More

Fireweed in sheep and the food chain | Posted April 2017
Written by: Helen Schaefer, District Veterinarian, South East Local Land Services, Bega
Fireweed is one of approximately thirty Senecio species reported to be responsible for livestock and human toxicity around the world. The toxic potential of Senecio species is due to the presence of pyrrolizidine alkaloids in all above-ground parts of the plant ... Read More

Foot and mouth disease: A diagnostic challenge? | Posted March 2015
Written by: Steve Eastwood, District Veterinarian, Northern Tablelands LLS, Armidale
FMD is often described in context of the typical clinical presentation in pigs and cattle. What is less recognised is that presentation in sheep can be varied and often difficult to diagnose in the field ... Read More

Foot abscess in merino ewes and first cross lambs | Posted July 2012
Written by: Toni Jericho, LH Ranger and Shaun Slattery, SDV North West LHPA
Wet weather and flooding in late summer-autumn resulted in a number of reports of foot abscess in the western parts of the North West LHPA ... Read More

Footrot: Past, present and future | Posted March 2015
Written by: Dan Salmon, Regional Veterinarian, Deniliquin
The Footrot Strategic Plan was relatively unique in the fact that there was very little government money involved in the actual program and there were no incentives of compensation schemes for the producers, all things that the textbooks proclaim are essential for successful disease control programs ... Read More

Frothy bloat in lactating merino ewes | Posted October 2014
Written by: Nik Cronin, District Veterinarian Forbes, Central West Local Land Services
and Rahul Shankar, District Veterinarian Young, Riverina Local land Services

In April a producer reported losing lactating ewes on a fresh lucerne paddock, six ewes out of 450 over a few days ... Read More


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Goitre in lambs | Posted March 2011
Written by: Ian Masters DV, Gundagai
A Poll Dorset stud reported unusually high lamb mortalities in a mob lambing down in May/June, 2010. About 25% of his lambs had been born dead or died soon after birth ... Read more

Goitrogenic compounds causing congenital goitre in Poll Dorset lambs | Posted September 2011
Written by: Penelope Hasson and Penelope Brown, 5th year Veterinary Science Students,
University of Sydney
Robert Watt, Cowra, private veterinary practitioner
Bruce Watt, Senior District Veterinarian, Tablelands Livestock Health and Pest Authority

Last spring lambing (2010), the producer noted a reduced lambing rate compared with normal years, in addition to an increased number of late term abortions and stillbirths ... Read More

Grain engorgement in weaner lambs | Posted May 2007
Written by: Eliz Braddon, DV Young RLPB
Sudden death in weaner lambs with one animal with intriguing respiratory grunts ... Read More

Grain overload and polioencephalomalacia in Dorper cross lambs | Posted September 2011
Written by: Andrew Biddle - District Veterinarian, New England LHPA
Six lambs were found dead in the paddock and a visit was scheduled for the following morning when 4 more animals had to be picked up while mustering ... Read More

Grain poisoning in merino ewes on wheat stubble | Posted August 2009
Written by: Katherine Marsh, DV Central West LHPA
Losses in ewes on wheat stubble with no apparent grain spills was investigated... Read More

Grain poisoning treated with virginiamycin and ad lib sodium bicarbonate | Posted August 2009
Written by: Tony Morton , DV, Hume LHPA
In the face of high mortality in sheep provided access to a paddock with grain spills ... Read More

Grass seed infestation of ear of lambs with penetration through the auditory meatus | Posted June 2011
Written by: Dan Salmon, District Veterinarian, Riverina RLPB
Grass seed penetration is a significant problem of domestic animals with the barbed awns of many native and introduced grass species penetrating the ears ... Read More

Gudair® vaccine efficacy | Posted August 2010
Written by: Josephine Gollan, Jeff Eppleston, Navneet Dhand, Peter Windsor, Faculty of Veterinary Science, University of Sydney
The influence of management factors on the efficacy of Gudair® vaccine is studied ... Read More


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Haemochromatosis in two mobs of sheep | Posted August 2010
Written by: Gabrielle Morrice, District Veterinarian, Riverina LHPA
Two properties reported weight loss, lethargy and listlessness on a good diet ... Read More

Haemonchus dipstick test for detecting Barbers Pole worm in sheep | Posted August 2010
Written by: Mark Doherty, Technical Services Manager, Ancare Australia Pty Limited
The use of a test to detect traces of haemoglobin in faeces reflecting worm burdens ... Read More

Hepatogenous photosensitisation in lactating ewes on grazing oats that were direct drilled into a fungus-affected barley stubble | Posted November 2015
Written by: Amy Shergold, Riverina Local Land Services, Wagga Wagga
A mob of ewes with four-month old lambs at foot was put onto a grazing oat crop and two weeks later 200 of 1000 ewes showed signs of photosensitisation ... Read More

Histophilus somni epididymitis in Dorper rams | Posted March 2011
Written by: Dermot McNerney, VO Dareton
A producer telephoned to advise that some rams had swollen scrotums. It was unclear for how long they had swollen scrotums but the affected rams appeared to have ... Read more

How to host an anthrax incident | Posted March 2011
Written by: Dan Salmon, Senior District Veterinarian, Deniliquin
Anthrax is not uncommon in parts of the Riverina Livestock Health and Pest District. In an area between Deniliquin and Jerilderie half of the properties have had at least one animal diagnosed with anthrax during the past 40 years ... Read more

Hypocalcaemia and ketosis associated with handling in late pregnant ewes | Posted October 2013
Written by: Bruce Watt, Tablelands Livestock Health and Pest Authority, Bathurst
In this outbreak, 21 of 250 mature merino ewes suffered from clinical hypocalcaemia after they were held off feed for 26 hours, as they were mustered, crutched and drenched. Sixteen of 21 ewes recovered with treatment. Five of 21 ewes either died or were euthanased ... Read More

Hypocalcaemia in sheep | Posted March 2012
Written by: Gabe Morrice, Riverina Livestock Health and Pest Authority, Narrandera
Hypocalcaemia in sheep is a non-seasonal, feed related condition that occurs predominantly in late pregnant and lactating ewes and weaner lambs. There is an increased incidence in older ewes and in multiparous ewes ... Read More

Hypoagnesaemia in sheep | Posted March 2012
Written by: Steve Whittaker and Brigit Pitman, Hume LHPA
Metabolic diseases have been identified as a cause of sheep deaths in NE Victoria since the 1960s. Metabolic diseases cause mortalities in Hume Livestock Health and Pest Authority sheep flocks each year ... Read More


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Illness and mortalities in crossbred lambs, Erysipelothrix rhusiopathiae cultured from a single joint | Posted February 2015
Written by: Nik Cronin, DV Forbes and Hanna Thomas, DV Condobolin Central West Local Land Services
This report outlines a case of illness and mortalities in ten month old cross bred lambs with depression, lameness and joint swellings post shearing ... Read More

Intestinal adenocarcinoma in an emaciated first cross ewe | Posted March 2015
Written by: Patrick Shearer, State Veterinary Diagnostic Laboratory, Menangle and Bruce Watt, Central Tablelands Local Land Services, Bathurst
Intestinal adenocarcinoma is a common tumour of older sheep. Most are discovered at slaughter as incidental findings; if clinical signs are present, weight loss and occasionally ascites are usually the only findings ... Read more

Intestinal accident in fedlot lambs | Posted August 2007
Written by: Eloise Cotton Veterinary Intern, and Shaun Slattery DV Narrabri
Sudden death in lambs with post mortem signs redolent of Redgut, but something is not quite right ... Read More


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Johne’s disease B, S or C strain type: What does it all mean? | Posted March 2015
Written by: IB Marshaand RJ Whittingtonb
aElizabeth Macarthur Agricultural Institute, NSW Department of Primary Industries, Menangle
bFaculty of Veterinary Science, University of Sydney

The term bacterial strain now exists in two broad contexts: bacterial taxonomy and bacterial epidemiology - taxonomically, a bacterial strain is a population of bacteria that descend from a single organism or pure culture, while the epidemiological definition of strain refers to a phenotypic ... Read More


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Kangaroo gait in lactating ewes | Posted December 2016
Written by: Annabel Cadzow, Final-year DVM student, University of Adelaide, Roseworthy and Bruce Watt, Tablelands Livestock Health and Pest Authority, Bathurst
Kangaroo gait in lactating ewes is an unusual neurological disease of low flock prevalence that typically affects multiple bearing ewes of larger breeds 3-6 weeks after lambing ... Read More


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Laboratory detection of Fasciola hepatica in live sheep | Posted March 2016
Written by: Rob Woodgate, Tara Cassidy and Stephen Love
In this paper we briefly review testing options and report some of the results to date in evaluating a faecal antigen ELISA test as an alternative for checking live sheep for F. hepatica ... Read More

Lachlan drench resistance trial | Posted April 2013
Written by: Elizabeth Braddon, SDV Lachlan
In September 2011, the Lachlan LHPA undertook a targeted surveillance project to assess the drench resistance profile of our commonly used drenches against the three sheep internal parasite pathogens ... Read More

Lack of response to trace mineral supplementation of sheep and cattle on the central tablelands of NSW | Posted June 2015
Written by: BR Watt, K Crawford and J Eppleston, Tablelands Livestock Health and Pest Authority (now Central Tablelands Local Land Service), Bathurst NSW
In this paper we present the findings from two studies in sheep and cattle in which production responses following supplementation with selenium, vitamin B12 and a commercial mineral mix were absent in the face of low blood levels of GSHPX and/or vitamin B12 ... Read More

Lameness and foot lesions in Dorper sheep | Posted June 2011
Written by: Jillian Lawrence, University of Sydney Intern and Libby Read, District Veterinarian, North West LHPA
Three cases of lameness in Dorper sheep were investigated during December and January ... Read More

Lameness and losses in crossbred ewes affected by floodwater | Posted December 2012
Written by: Belinda Edmonstone, District Veterinarian, Lachlan LHPA, Forbes Office
At the end of February and beginning of March 2012, the Lachlan River catchment received heavy rain over what was already a saturated area, with eight hundred 2 year old crossbred ewes stranded in water for 5 days ... Read More

Lameness in sheep associated with Tribulus terresteris | Posted July 2013
Written by: David Cervera, Luis Miguel Ferrer and Delia Lacasta, Veterinary Faculty of Zaragoza, Spain
Two sheep farms running 2500 sheep in total were affected with lamenes, in one flock 70 of 1000 sheep were affected ... Read More

Larval hypobiosis Teladorsagia (Ostertagia) circumcincta | Posted March 2012
Written by: Dan Salmon, SDV Deniliquin
Inhibited fourth-stage larvae (L4) of Ostertagia ostertagi are an important factor in the development of clinical ostertagiasis of cattle in southern Australia before the development of anthelmintics effective against the larvae embedded in the abomasal mucosa ... Read More

Lessons from a regional lice control project in the tablelands of NSW | Posted June 2015
Written by: J Eppleston and B Watt, Tablelands Livestock Health and Pest Authority (now Central Tablelands Local Land Service), Bathurst NSW
This paper describes the results achieved during the three year project and highlights some of the challenges and obstacles encountered to achieving good regional lice control ... Read More

Listeria ivanovii abortion in sheep associated with decaying plant matter | Posted December 2011
Written by: Tanya Rajkumar, Katie Boulton (final year veterinary students University of Sydney) and Elizabeth Braddon (Lachlan LHPA DV, Young) and Ian Masters (Hume LHPA DV, Gundagai) and Helen McGregor (Hume LHPA DV, Wagga Wagga) and Michael Hornitzky (Senior Principal Research Scientist, EMAI) and Bruce Watt (Tablelands LHPA DV, Bathurst)
Within the Listeria genus, Listeria monocytogenes and Listeria ivanovii are the most important pathogenic organisms in animals, with sheep being more susceptible to infection than cattle ... Read More

Listeriosis in silage-fed ewes | Posted December 2011
Written by: Ruth and Howard Thompson, Blayney Veterinary Hospital, Erika Bunker, NSW State Veterinary Diagnostic Laboratory, Menangle, BR Watt, Tablelands Livestock Health and Pest Authority, Bathurst
Listeria monocytogenes is a bacterium capable of surviving and multiplying in a wide range of environments including moist soil, the gastro-intestinal tract of normal animals and in silage that has been exposed to air and has a pH of above 4.5 ... Read More


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Mannheimia mastitis and concurrent pneumonia in merino ewes with lambs at foot | Posted August 2007
Written by: Bruce Watt, DV Central Tablelands
This report describes an occurence of Mannheimia mastitis with pneumonia in two merino ewes with lambs at foot ... Read More

Mannheimia pleuritis and bronchopneumonia in young merino lambs | Posted August 2007
Written by: Bruce Watt, DV Central Tablelands; Patrick Staples, OAI
This report describes an outbreak of Mannheimia spp pneumonia in two to four week old lambs ... Read More

A case of Mycoplasma ovis | Posted March 2015
Written by: Linda Searle, District Veterinarian, Deniliquin
M. ovisis a bacterial infection which may not cause any clinical signs but when numbers are large enough it leads to massive destruction of erythrocytes and subsequently anaemia and jaundice ... Read More

Mycoplasma ovis in north western NSW | Posted July 2012
Written by: Libby Read, District Veterinarian, North West Livestock Health and Pest Authority
Mycoplasma ovis (formerly Eperythrozoon ovis) causes the disease known as eperythrozoonosis in sheep flocks throughout Australia ... Read More

Mycotoxicosis in a merino flock | Posted February 2015
Written by: Megan Davies, District Veterinarian, Narrabri / Walgett
Mycotoxins are secondary mould metabolites produced by certain species of fungi commonly found in grain, hay and silage, and occur as a result of fungal contamination of the feed during growth, harvest or storage ... Read More


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National sheep health monitoring project | Posted June 2015
Written by: Samantha Allan, Senior Veterinary Officer, Animal Biosecurity, NSW Department of Primary Industries, Tamworth Agricultural Institute
Monitoring occurs in both export and domestic processing plants across Australia. Reports are collected on a range of conditions identified by producers, processors and state departments as having a significant economic impact on sheep production ... Read more

Neonatal lamb mortality | Posted March 2016
Written by: Scott Ison, Murray Local Land Services, Albury
Lamb survival in Australian flocks has become a focal point of industry groups and researchers in recent years. The recent MLA report listed Neonatal Lamb Mortalities as the most costly of 17 cattle, 23 sheep and nine goat diseases ... Read more

Neurogenetic progressive ataxia in merino sheep: segmental axonopathy and cerebellar abiotrophy | Posted March 2011
Written by: Bruce Watt and Mandi Carr, Tablelands Livestock Health and Pest Authority and Zoe Spiers and Kaiser Dawood, State Veterinary Diagnostic Laboratory, Menangle
Studies conducted in the mid 1980s on progressive ataxia in Merino sheep identified two distinct clinical and pathological syndromes ... Read More

Non infectious causes of reproduction wastage in sheep | Posted March 2011
Written by: Greg McCann - Senior District Veterinarian, Central West LHPA
The ewe is a short day breeder, which is to say that she normally has her strongest reproductive performance when daylight is decreasing. The optimal breeding period for the ewe ... Read more


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Ocular squamous cell carcinoma in merino ewes | Posted November 2016
Written by: Ella Duldig, PIRSA Animal Health Officer and Dr Jeremy Rogers, Senior Veterinary Officer, Murray Bridge, South Australia
Cancer eye is the most common form of ocular neoplasia in sheep and cattle with lesions typically occuring on the eye and eyelids. The cause is likely multifactorial, but predisposing factors may include ... Read More

Oesophagitis mortalities | Posted March 2016
Written by: Andrew Peters, Timothy Biffin, Emma Croser and Janet Wild
Sudden death was reported in 22 of 2100 merino crossbred weaner lambs (3-4 months old) showing symptoms that were rapidly progressive, including weakness, altered mentation, ... Read More

OJD High Mortality | Posted May 2007
Written by: John Evers, DV Young & Bruce Watt, DV Central Tablelands
High losses reported in the unvaccinated wether portion of a mixed merino flock ... Read More

OJD Staggers | Posted September 2011
Written by: BR Watt, Tablelands LHPA, Eliz Braddon, Lachlan LHPA, Sarah Robinson, NSW DPI and Tony Morton, Hume LHPA
Oil based vaccines, as used in Australia to control ovine paratuberculosis, provoke a local tissue reaction that can include granulomatous cellulitis and lymphadenitis. If the vaccine is incorrectly administered ... Read More

OJD - Adverse reactions to Gudair® vaccine | Posted May 2007
Written by: Tony Morton, District Veterinarian, Wagga Wagga RLPB
Discharging abscesses, granulomatous lesions in Wiltshire Horns ... Read More

Ovine Johnes Disease | Posted August 2007
Written by: Eliz Braddon, DV Young
A producer worried about thin sheep, with sporadic losses, but finding no relief with a thorough drenching program ... Read More

Ovine hypocalcaemia conundrums | Posted March 2012
Written by: Bruce Watt, Tablelands Livestock Health and Pest Authority, Bathurst
Hypocalcaemia while sporadic, occasionally causes major losses especially in pregnant and lactating ewes. It was estimated for example that between 100,000 and 300,000 pregnant ewes die from hypocalcaemia each year in Victoria ... Read More

Ovine mastitis outbreak caused by suspected bite wounds to the udder | Posted March 2012
Written by: Maria Sanchez, Marta Borobia, Luis M. Ferrer, Aurora Ortin, Jose M. Gonzalez and Delia Lacasta Animal Pathology Department, Veterinary Faculty, University of Zaragoza. Spain
In this paper it is described an outbreak of acute mastitis as a result of bite wounds in the udder in a pre-partum meat sheep ... Read More

Ovine metabolic conditions encountered in Central West LHPA | Posted March 2012
Written by: Greg McCann BVSc, Senior District Veterinarian, CWLHPA
Sheep at the best of times don’t give a lot away when being assessed by a clinician. This can be a daunting trait when the examining clinician does not have the benefit of experience ... Read More

Ovine respiratory disorders - a global overview | Posted March 2016
Written by: Peter Windsor, Professor Emeritus, Faculty of Veterinary Science, University of Sydney
Throughout the world, the most common respiratory disorders of sheep are rhinitis/sinusitis and pneumonia, caused by a wide range of host-pathogen-environment (HPE) interactions that reflect the various sheep husbandry systems used in different countries ... Read More


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Phalaris poisoning syndromes | Posted September 2016
Written by: Associate Professor Peter Windsor, Farm Animal Health, University of Sydney
Phalaris aquatica does have the potential to become a toxic pasture plant, producing a variety of unrelated syndromes which manifest either as neurological or cardiac disturbances ... Read More

Phalaris staggers | Posted September 2012
Written by: David Rendell, 60 Portland Rd Hamilton 3300
Phalaris staggers risk is a function of paddock soil cobalt levels, level of soil ingestion and level of phalaris dominance and palatability. Cases can occur at all times of the year but peaks in late winter ... Read More

Phalaris staggers persisting for seven months post exposure in crossbred lambs | Posted December 2012
Written by: Simon Choi (Veterinary student, University of Sydney), Anon,
Erika Bunker (State Veterinary Laboratory) and
Bruce Watt (Tablelands Livestock Health and Pest Authority, Bathurst)

A report of phalaris staggers affecting only the lambs from a mob of first cross ewes and lambs with deaths continuing to occur for seven months post exposure and clinical signs for eight months. ... Read More

Phosphorus deficiency in sheep - a case report | Posted March 2012
Written by: Bill Johnson, District Veterinarian, Tablelands LHPA, Goulburn
Symptoms of primary phosphorus deficiency are seen frequently in NSW cattle, when grazing mainly native pastures in coastal, rangelands, and more recently tablelands areas ... Read More

Photosensitisation and cholangiohepatopathy (Dikoor) in lambs grazing a forage brassica crop contaminated with Panicum gilvum | Posted July 2013
Written by: Bruce Watt, (Tablelands LHPA Bathurst), Belinda Hackney (formerly of NSW DPI Bathurst), Erika Bunker (State Veterinary Diagnostic Laboratory, Menangle)
Brassicas, when grazed, can cause several livestock health problems but are not reported as causing cholangiopathy or hepatopathy. This is a report of a case of crystal-associated cholangiohepatopathy in lambs grazing Winfred forage brassica ... Read More

Photosensitisation caused by st john’s wort | Posted March 2012
Written by: Evelyn Walker, District Veterinarian, Central West LHPA, Dubbo
A sheep producer from the Yeoval area reported problems with severe sunburn in one mob of 350 adult Merino ewes with 200 lambs at foot in late November 2011. The owner first noticed droopy ears and scabby faces ... Read More

Pilot survey of the prevalence of serum antibodies against Toxoplasma gondii and risk factors for transmission of T gondii to sheep in the Tumbarumba Shire of NSW | Posted March 2011
Written by: Rosalie Harvey BSc BVSc Hons and Helen McGregor DV LHPA Hume
Sheep are more commonly infected by T. gondii than other livestock such as cattle or pigs ... Read more

Pneumonic and vertebral abscesses in a Dorper lamb | Posted March 2011
Written by: Evelyn Walker, District Veterinarian, Central West Livestock Health and Pest Authority, Dubbo
One lamb was found in the paddock and unable to ambulate. The affected lamb was presented with hindlimb paralysis of 72 hour duration. The owner reported similar findings in at least 6 others ... Read more

Presumed lightning strike | Posted March 2012
Written by: Bruce Watt, Tablelands Livestock and Health Authority, Bathurst
The owner of a sheep property 45 km east of Bathurst presented a photograph of 15 of 70 sheep found dead under a tree ... Read More

Polioencephalomalacia in adult ewes in the tablelands of NSW | Posted March 2012
Written by: Nicole Burns, Charles Sturt University Veterinary Science Student
Alan Taylor, Central West Livestock Health and Pest Authority, Molong

Polioencephalomalacia (PEM) is a histological description of a neurological disease in ruminants that is a result of various aetiologies, including high sulphur intake, altered thiamine status, salt poisoning/water deprivation and lead poisoning ... Read More

Polioencephalomalacia in a merino flock | Posted August 2009
Written by: Steve Eastwood, District Veterinarian, New England LHPA, Armidale
In March 2008, 30 mixed aged, merino ewes died. The 500 head flock had been ... Read More

Post-mulesing arthritis | Posted March 2012
Written by: Greg Curran, Veterinary Officer, DPI, Broken Hill
About a week after mulesing, flockowners saw lambs with large swollen joints, were lame and found it difficult to move, feed and water ... Read More

Possible Arboviral Disease in Sheep | Posted September 2011
Written by: Matt Ball- District Veterinarian Lismore
A farmer near Grafton reported lambs being born in the winter of 2011 with twisted necks, a syndrome had also been seen the previous year on both his property and on the neighbour’s property ... Read More

Primary copper poisoning in two flocks of ewes | Posted August 2009
Written by: Bruce Watt, DV Bathurst, Tablelands LHPA and Tristan Maugauret, Veterinary Intern, The University of Sydney
In southeastern Australia the most common cause of copper poisoining is ... Read More

Pyrrolizidine alkaloid poisoning of sheep | Posted March 2012
Written by: D Salmon Riverina Livestock Health and Pest Authority
Pyrrolizidine alkaloids are toxins contained in many plants of which two, heliotrope and Paterson’s curse, are common in southern NSW. The toxins cause liver damage ... Read More


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Ram semen culture results | Posted August 2010
Written by: Greg McCann, Senior District Veterinarian, Central West LHPA, Dubbo
Culture results from ram semen indicate a range of organisms found, including ... Read More

Rationale for conducting a vitamin B12 response trial in an area with no indication of cobalt deficiency | Posted December 2010 Written by: Bruce Watt and Jeff Eppleston, Tablelands Livestock Health and Pest Authority
We conducted a response trial in which half of a mob of crossbred lambs was treated with vitamin B12 at lamb marking ... Read More

Reflections of an ethologist | Posted April 2013
Written by: Geoff Green, Livestock Health Ranger, New England LHPA
The majority of our work was with sheep with excursions into research on cattle and wombats. Most of our sheep work was done with merinos with some small projects branching into work with the British breeds and merino crossbreds ... Read More

Relevance of historical anthrax data in current property risk assessments | Posted August 2015
Written by: Barbara Moloney, NSW DPI Orange and Dan Salmon, LLS Murray (formerly SDV Riverina)
Very early reports of anthrax cases can be found in the Sydney Morning Herald (1851) and the Department of Mines Annual Reports going back to at least 1886 ... Read more

Reproductive performance of a small Dorper flock in North-West NSW | Posted January 2014
Written by: Libby Guest, North West Livestock Health and Pest Authority, Narrabri
Dorpers are promoted in Australia as being easy-care, drought-tolerant, fertile and productive. The aim of this study was to record the reproductive performance of a small Dorper flock on the plains of north-western NSW ... Read More

A review of vitamin B12 supplementation in sheep | Posted April 2013
Written by: Elizabeth Barter, final year veterinary student, University of Sydney
In recent years, the use of supplementary vitamin B12 in sheep to improve fertility and weight gain has increased. This use has extended to areas that do not have cobalt deficient soils and where deficiency of vitamin B12 in sheep is not suspected ... Read More

Review of a prolonged Brucella ovis eradication | Posted March 2012
Written by: Michaela Woolford, CSU veterinary student and Libby Read, District Veterinarian North West LHPA
Brucella ovis infection is a major cause of epididymitis and infertility in rams, resulting in reproductive failure and significant economic losses ... Read More

Revisiting the transmission of Taenia ovis (sheep measles) in Australia | Posted June 2015
Written by: David J Jenkins, School of Animal and Veterinary Sciences, Charles Sturt University, Wagga Wagga, NSW
The importance of T. ovis is financial losses for the Australian sheep meat industry through downgrading and condemnation of meat and hearts and is a potential impediment to international trade of sheep meat ... Read more

Rickets in lambs on grazing cereal crops | Posted March 2012
Written by: Belinda Edmonstone, DV Lachlan LHPA Forbes
Rickets is a disease of young growing animals characterised by defective calcification of growing bones. Bones are subject to pressure distortion and fractures. Rickets can be caused by a deficiency in vitamin D, calcium and/or phosphorus or an imbalance of the calcium: phosphorus ratio ... Read More

Rock fern poisoning | Posted August 2007
Written by: Andew Thompson, DV Northern Slopes
Significant mortality following good rain with sheep collapsing on handling for ... Read More

Rock fern poisoning in sheep and cattle | Posted July 2013
Written by: Duncan McRae, Katie Kent (SU vet students) and Greg McCann
Rock fern poisoning is capable of causing significant disease in both sheep and cattle.
Signalment: Early weaned dairy calves placed in pasture with no mature animals.
Problem: All calves in the paddock had died ... Read More


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Salmonella case in lambs | Posted March 2011
Written by: Nik Cronin, District Veterinarian, Lachlan Livestock Health and Pest Authority, Forbes
This particular morning there were 15 dead animals in the sheep yards. This mob had arrived 1 week ago and were shorn but had not yet been vaccinated or drenched. The dead animals had evidence of a green, mucoid scour ... Read more

Scabby mouth (Orf) in vaccinted sheep | Posted August 2008
Written by: Bruce Watt, DV Central Tablelands
Scabby mouth is a common disease of Australian sheep. On properties that vaccinate, subsequent disease is rare... Read More

Secondary photosensitisation in lambs due to crystal associated cholangiohepatopathy while grazing common heliotrope (Heliotropium europaeum) probably caused by Panicum sp. toxicity | Posted September 2015
Written by: Scott Ison, Murray Local Land Services, Albury and Helen Peam, Veterinary Pathologist, Elizabeth McArthur Agricultural Institute
Secondary photosensitisation occurs when the photodynamic compound phytoporphyrin, a microbially produced metabolite of chlorophyll, is not cleared by the diseased liver of a herbivore and accumulates in the circulatory system and then in the skin ... Read More

Selected respiratory tract diseases of sheep in Spain | Posted April 2013
Written by: Delia Lacasta, Veterinary Faculty of Zaragoza, Spain
In part because of geography and in part because production systems are more intensive, respiratory diseases, while of some importance in Australia, are the most important cause of disease and mortality in Spanish sheep ... Read More

Selenium deficiency on the Southern Tablelands in 2014 | Posted April 2015
Written by: Alexandra Stephens, District Veterinarian Yass (South East LLS)
Clinical expression of selenium (Se) deficiency, in the form of white muscle disease in sheep and marked ill-thrift in cattle was seen in the spring of 2014 in the Yass and Monaro districts ... Read more

Selenium nutrition of sheep and cattle | Posted March 2011
Written by: Bruce Watt and Jeff Eppleston, Tablelands Livestock Health and Pest Authority, Bathurst, NSW
Selenium deficiency is characterised by myopathy and ill thrift in lambs and calves and infertility in ewes and cows. Selenium intoxication is a risk when livestock are overdosed ... Read more

Sheep deaths associated with the administration of controlled-release capsules | Posted December 2012
Written by: Bill Johnson, District Veterinarian, Goulburn
Ewes were standing away from the mob, some apparently blind and unaware of their surroundings, for about twenty-four hours prior to being found dead. ... Read More

Sheep and goat pox | Posted June 2015
Written by: Bruce Watt (Central Tablelands Local Land Services, Bathurst) and Colin Scrivener (Veterinary Consultant, Charles Sturt University, Wagga Wagga)
Capripoxvirus genus viruses generally cause host specific infections in sheep (sheep pox), goats (goat pox) and cattle (lumpy skin disease). However, some isolates infect both sheep and goats. Sheep and goat pox (SGP) infections cause high morbidity and mortality ... Read more

Sheep lice control - investments and activities | Posted August 2009
Written by: Jane Littlejohns, Project Manager, Animal Health and Welfare, AWI and Johann Schroderb, Program Manager, Animal Health, Welfare and Productivity, AWI
AWI has invested over $4 million on lice research and lice extension since 2000 ... Read More

Sheep lice: Industry situation and changing control practices | Posted March 2011
Written by: Peter James, Queensland Alliance for Agriculture and Food Innovation (QAAFI), University of Queensland
The most recent estimate of the cost of lice (Bovicola ovis) to the Australian sheep industry was $123m p.a. of which $84m was due to control costs ... Read more

Sheep lice prevalence in southern Tablelands NSW | Posted September 2012
Written by: S. Popp, Faculty of Agriculture, Food and Natural Resources, University of Sydney and J. Eppleston, Tablelands Livestock, Health and Pest Authority, Bathurst and B. R. Watt, Tablelands Livestock, Health and Pest Authority, Bathurst and S Mansfield, Faculty of Agriculture, Food and Natural Resources, University of Sydney and R. D. Bush, Faculty of Veterinary Science, University of Sydney, Camden
In response to suggestions that the incidence of louse infestations in New South Wales has increased markedly, a survey of 173 producers was conducted in the Tablelands Livestock Health and Pest Authority region using visual detection and a questionnaire to document retrospective lice history ... Read More

Sheep lice treatment trial: imidacloprid (avenge) resistance or faulty product application ? | Posted March 2012
Written by: Ian Masters, District Veterinarian, Gundagai
In August 2011, a producer from the Illabo district discussed his concerns with DV Wagga about possible imidacloprid resistance in sheep that had been treated with Avenge off shears the previous year ... Read More

Sporadic bovine encephalitis and ovine chlamydiosis in the Narrabri district | Posted March 2011
Written by: Shaun Slattery, SDV North West LHPA
These records contain sixteen reports of ovine chlamydiosis and thirty of sporadic bovine encephalomyelitis (SBE). On endemic properties ... Read more

A sporadic chondrodysplasia of unknown aetiology in lambs | Posted April 2013
Written by: BR Watt, Tablelands Livestock Health and Pest Authority, Bathurst NSW
This paper describes a sporadic chondrodysplasia in lambs. In the experience of the author, this disorder (or disorders) occurs at low prevalence across a wide area central NSW and it not associated with the presence of plants of the Trachymene genus ... Read More

Staggers in medium wool merinos | Posted February 2015
Written by: Dr Cecily Moore, DV Coonabarabran
The occurrence of staggers in lambs in a medium wool merino flock was investigated with initial histopathological findings of the central nervous system consistent with a diagnosis of degenerative thoracic myelopathy ... Read More

Staphylococcus aureus mastitis in a jaundiced ewe | Posted February 2015
Written by: Bruce Watt, Central Tablelands Local Land Service, Bathurst and Patrick Shearer, State Veterinary Diagnostic Laboratory, Menangle
In this case jaundice is presumed to be due to the elaboration of toxins associated with staphylococcal mastitis as there is no evidence of hepatopathy or copper poisoning ... Read More

Study into reports of nephritis in lambs in the South Australian mallee | Posted April 2017
Written by: Jeremy Rogers, Senior Veterinary Officer, State Flora Office, Murray Bridge, South Australia & Elise Matthews, Veterinary Officer, EAS Manager & Kirsty Cordon, Veterinary Officer; PIRSA, Glenside, South Australia
An apparently rising incidence of lesions described as “Nephritis” in lambs being inspected at two major abattoirs in South Australia led to a study attempting to define the syndrome, it’s costs to production (if any) and possible mitigations ... Read More

Superphosphate poisoning in sheep | Posted July 2012
Written by: Eliz Braddon, Senior District Veterinarian Lachlan LHPA
Cases of superphosphate poisoning are reported as rare in the literature. The fact that I have seen two of these cases in seven years seemed unusual ... Read More

Survey of leptospirosis exposure in livestock in the north west, central west, central north, darling and lachlan livestock health and pest authorities of NSW | Posted June 2015
Written by: N Charman#, A Hodge#, C Colantoni# and J. Kelly* - # Zoetis Australia Pty Ltd, 5 Rider Boulevard, Rhodes, NSW - * Central West Local Land Services, 12 Buckley Drive, Coonamble, NSW
This paper describes a survey conducted to determine the level of Leptospira borgpetersenii serovar Hardjo and Leptospira interrogans serovar Pomona exposure in sheep flocks, cattle herds and feral pig populations through a serological surveillance of unvaccinated flocks and herds ... Read More

Suspect Sarcoptes infection in sheep and humans | Posted March 2012
Written by: Phillip Kemsley, District Veterinarian Casino
The owner reported hair loss around the eyes and ears in a 17 month old Damara x Dorper ewe ... Read More

Swayback in Western Division, NSW | Posted March 2012
Written by: Dermot McNerney, Veterinary Officer, Dareton, Kaiser Dawood, Trainee Pathologist, EMAI
A visit was made to the property three days after viewing a video clip of a ewe and a lamb both with coordination difficulties. The lamb had complete loss of function in the hind limbs ... Read More


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Thymic tissue found extrathoracically in Dorper lambs | Posted August 2010
Written by: Libby Read, District Veterinarian, North West LHPA (Narrabri-Walgett)
Submadibular, bilateral swellings appear in small numbers of Dorper lambs ... Read More

Tick borne diseases of sheep | Posted August 2010
Written by: Bruce Watt, Tablelands LHPA, Bathurst and Michelle Dennis, Faculty of Vet Sc, University of Sydney
An overview of diseases spread by ticks in sheep that Australian veterinarians ... Read More

Trial of treatment options for feedlot lambs | Posted March 2011
Written by: Belinda Edmonstone - DV Lachlan LHPA and Greg Curran- Technical Specialist (Western Division), Broken Hill I&I NSW
A lamb feedlot operator was considering how best to prepare and support lambs being feed lotted. It was agreed that the best approach would be run a trial to see how lambs responded to each treatment regimen ... Read more

Trypanosomes - A millstone for the developing world and an insidious threat to Australian livestock | Posted March 2015
Written by:Bruce Watt, Central Tablelands Local Land Service, Bathurst NSW
Pathogenic forms of trypanosomes are the major constraint to livestock production in much of Africa and also cause losses in South America and Asia. In Australia, the species found in livestock are not obviously associated with disease ... Read more

Turning the worm | Posted March 2015
Written by: Stephen Love, NSW Department of Primary Industries, Armidale NSW
Turning the Worm is a twist on ‘the worm turns’ which refers to people, groups or things that, after being badly treated for a long time, suddenly and forcefully resist. The worms we deal with can be a bit like that ... Read More


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Ulcerative balanitis in rams – ‘An enigmatic disease of unknown aetiology’ | Posted November 2016
Written by: Bruce Watt, Central Tablelands LLS and Petrea Wait, South East LLS and Shaun Slattery North West LLS
Balanitis or balanoposthitis is occasionally encountered, especially in young rams, usually associated with joining. In Australia the condition was first described in young Border Leicester rams but has subsequently been seen in a range of breeds ... Read More

Urolithiasis due to an unbalanced diet in a Spanish lamb feedlot | Posted March 2012
Written by: Carlos Alcay, Luis Miguel Ferrer, Juan Jose Ramos, Marta Ruiz de Arcaute, Marta Borobia and Delia Lacasta Animal Pathology Department, Veterinary Faculty, University of Zaragoza, Spain
In recent months (September-November, 2011) there have been sporadic deaths in feedlot lambs, a similar outbreak in 2010 caused a morbidity of 2% and mortality of 1% ... Read More

Urolithiasis in feedlot lambs | Posted October 2014
Written by: Eliz Braddon, Riverina Local Land Services
On examination approximately 6 animals showed signs of illthrift, a tucked-up appearance and stood on their own. Closer inspection showed swelling in the ventral abdominal area and in a few cases, a necrotic draining wound was found ventral ... Read More

Urolithiasis in Lot-fed Crossbed Wethers on Commercial Pellets | Posted August 2007
Written by: Bruce Watt, DV Central Tablelands
Deaths among fed-lot crossbred wether lambs with swellings in the prepuce and ... Read More

Uterine torsion and rupture in a full term multiparous ewe | Posted October 2014
Written by: Bruce Watt (Central Tablelands Local Land Services, Bathurst)
This case is of interest in that the ewe suffered two potentially fatal uterine accidents simultaneously. While this ewe died from blood loss, an undiagnosed uterine torsion would have also led to foetal death, septicaemia and death of the ewe ... Read More


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Vertebral abscesses causing hindlimb paresis in lambes | Posted October 2010 Written by: Bruce Watt, DV Central Tablelands
Vertebral osteomyelitis is generally assumed to be an ascending infection post tail docking and/or mulesing ... Read More

Very sudden death in White Suffok ram lambs | Posted May 2007
Written by: Harry Suddes DV Murray
Sixteen, otherwise healthy, lambs found dead in a pile ... Read More

Vitamin B12 in sheep on the NSW southern tablelands | Posted March 2011
Written by: Bill Johnson, District Veterinarian, Goulburn
Vitamin B12 is essential for normal growth in sheep, and is produced from cobalt in the rumen. Depending on the severity of the deficiency and age of the animal ... Read more


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Water, water everywhere and not a spot to stand | Posted March 2011
Written by: Libby Read, DV Narrabri-Walgett
Since the beginning of December 2010, five river systems within the NWLHPA have flooded requiring significant responses. Flooding in these river systems is generally widespread and slow moving ... Read more

Weaner management project with Pfizer Eryvac - findings after the first year | Posted August 2008
Written by: Bruce Watt, DV Central Tablelands et al
High mortality and poor preformance in merino lambs is a well documented problem ... Read More

Weaner sheep colitis of uncertain aetiology: a case study | Posted April 2017
Written by: Scott Ison, Murray Local Land Services, Deniliquin, Erika Bunker, NSW State Veterinary Diagnostic Laboratory, Menangle and Jim Walsh, Coopers Animal Health, Bendigo
This case report describes an investigation of seasonal weaner colitis in a self-replacing fine wool merino flock with an apparent failure of, or resistance to, antibiotic treatment ... Read More

Welfare revolution of topical anaesthesia on wool sheep farms in Australia: is there a place for zylazine and / or NSAIDs ? | Posted March 2012
Written by: Peter Windsor, Crystal Espinoza, Sabrina Lomax, Faculty of Veterinary Science, University of Sydney, Camden
Mulesing of Australian Merino lambs with the ‘skin wrinkle’ phenotypes, provides effective life-long protection against the risk of ‘breech strike’ caused by Lucilia cuprina, the sheep blowfly. It is estimated that at least 2million sheep would die annually of flystrike if mulesing were banned ... Read More

What lice?
Written by: Narelle Sales, Microbiological Diseases and Diagnostics Research, Elizabeth Macarthur Agricultural Institute | Posted March 2015
The problem with lice infestations on sheep is that by the time you can see them it may have already cost the producer money and will certainly cost more before they are cleared up. Having a test that can detect 1 or 2 lice in a flock ... Read More

Widespread primary photosensitisation of unknown aetiology in sheep in the NSW Riverina | Posted November 2015
Written by: Dan Salmon, Linda Searle and Roseanne Farrant, Deniliquin; Des McRae, Jerilderie; Mark Corrigan and Scott Ison, Albury
In late April and early May of 2015 there was a significant occurrence of photosensitisation in sheep which appeared to be primary photosensitisation without liver damage ... Read More

WormBoss: capturing the information from Integrated Parasite Management in sheep | Posted April 2013
Written by: Lewis Kahn, Animal Science (W49) school of Environmental and Rural Science, University of New England, Armidale NSW
Gastrointestinal nematode parasites impose the largest animal health cost to the Australian sheep industry. The majority of this cost is associated with production loss which occurs despite control strategies implemented on farm by sheep producers ... Read More

Within flock prevalence of non-footrot lesions in sheep and the impact of pre-lambing iodine supplementation on the expression of foot abscess | Posted July 2012
Written by: Bruce Watt and Jeff Eppleston, Tablelands Livestock Health and Pest Authority
Foot abscess (heel abscess, infectious bulbar necrosis, digital suppuration) is a necrotic then suppurative condition of the ovine foot predisposed by water maceration or other interdigital skin damage followed by a synergistic infection with ... Read More


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Yersinia pseudotuberculosis enteritis in adult sheep | Posted March 2016
Written by: Nigel Gillan, District Veterinarian, Mudgee
While Yersinia enteritis is known to occur in adult sheep, most reports focus on the disease in younger animals, and recent work has sought to clarify the role of Y. pseudotuberculosis and Y. enterocolitica in a weaner scours syndrome ... Read More

Yersinia enterocolitica abortion in ewes | Posted September 2012
Written by: Bruce Watt, Tablelands Livestock Health and Pest Authority
In early August 2010, the owner of a mob of 180 mature Merino White Suffolk ewes noticed five dead premature foetuses and two live premature lambs ... Read More


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Zinc phosphide toxicity in crossbred ewes | Posted March 2016
Written by: Gabrielle Morrice, DV Narrandera
Zinc phosphide is a rodenticide used to treat grain, and used extensively in recent mice plagues to control mice damage in crops through perimeter baiting of crops ... Read More