Epidural steatitis and vertebral osteomyelitis in a dog

Epidural steatitis and vertebral osteomyelitis in a dog
 
History:  A 1 year old spayed female bulldog mix canine became acutely non-ambulatory, and both rear limbs were hyporeflexive.
Gross Necropsy:
There was a 7 cm x 3 cm x 3 cm abscess in the epaxial musculature of the lumbar spine containing red-brown purulent fluid. The muscles surrounding the abscess including the epaxial and [...]

Ventriculitis, Hepatitis, and unusual inclusion bodies in Quail

Ventriculitis, Hepatitis, and unusual inclusion bodies in Quail
This post presents some unusual and interesting histologic findings of Quail.  Three quail of different ages died acutely.  The birds are raised since birth and at 1 month are turned into an outside pen.  There are 10 dead birds out of a flock of 200. These birds puff up after [...]

Hepatic Granulomas in a Blood Python

Hepatic Granulomas in a Blood Python
History:  A 6 month old Blood Python was found dead with no apparent illness.
 
Gross Lesions: 
The snake was thin with prominent dorsal spinous processes of the vertebrae with mild autolysis. The stomach contained a partially digested mouse, and the colon was full of moderately firm feces. Near the vent was a [...]

Multifocal hepatic necrosis in a bovine fetus

Multifocal hepatic necrosis in a bovine fetus
History:  Two aborted bovine fetuses were submitted.  One had been partially scavenged, the other was intact.   The herd was vaccinated on 10/10/08 with Bovishield Gold VL5 and Ultrabac 7.   There are 24 heifers in the herd and 6 have aborted at the same time.
Gross Lesions: None, the placenta was [...]

Proliferative Ileitis in a pig – Lawsonia intracellularis

History: A 20 lb pig of unknown age had a history of diarrhea. (Thats all we know)
Gross Lesions:
The ileum and distal jejunum were diffusely thickened, with a cobblestoned appearance to the serosa and corrugated mucosa which was covered in a moderate amount of green to yellow fibrin. The serosal surface of the colon had multiple [...]

Blackleg in a herd of Steer- Clostridium chauvoei

History: A steer was found dead with no prior clinical signs. The farm had 12 animals die (of 550) over the past 10 days.
Gross Findings:
Subcutaneous and muscular emphysema throughout the animal. There was moderate to severe retroperitoneal and mediastinal edema. The hind-limb skeletal muscles had multiple dark red areas and were emphysematous. They [...]

Tyzzer’s Disease in a Feline

Answer: Whats your diagnosis # 1
this page was originally posted as WYD # 1, click below for the original page or scroll down for the rest of the information.
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Multifocal hepatic necrosis

Warthin Starry Silver stain.

Clostridium piliforme is visible at the edge of necrotic areas. We also found focal transmural necrosis of the [...]