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

2014 Winter edition of case studies

Sheep

Actinobacillus seminus as a cause of abortion in an Australian sheep flock
Written by: Bruce Watt (Central Tablelands Local Land Service, Bathurst) and Helen Peam (State Veterinary Diagnostic Laboratory, Menangle)
The owner of a mob of 150 mixed age first cross ewes reported that 2-3 weeks prior to lambing, seven ewes aborted or produced stillborn premature lambs ... Read More

Frothy bloat in lactating merino ewes
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

Urolithiasis in feedlot lambs
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

Uterine torsion and rupture in a full term multiparous ewe
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

Cattle

Curved rice flower (Pimelea curviflora) associated with deaths in cattle in the Riverina
Written by: Gabrielle Morrice, Riverina Local Land Services, Narrandera
Although curved rice flower/tough-barked rice flower (Pimelea curviflora) occurs in the south western region of NSW, it has not previously been recorded as a cause of death or illness in cattle in this region ... Read More

Multiple agents causing respiratory disease and mortality in grass fed steers
Written by: Alexandra Stephens, SE LLS Yass
These two cases of Bovine Respiratory Disease Complex were seen in grass fed steers on good quality and quantity pastures and water with no crowding or inclement weather ... Read More

Presumed false blackleg (malignant oedema) in Angus steers
Written by: Bruce Watt (Central Tablelands LLS) and Erika Bunker (State Veterinary Diagnostic Laboratory, Menangle)
Clostridium septicum is the causal agent of a number of wound and tissue infections of livestock including malignant oedema, gas gangrene, ‘false blackleg’ and swelled head in rams. However, as Cl. septicum is a post-mortem invader, its isolation from tissues alone is insufficient to establish a diagnosis ... Read More