Leptospirosis and panuveitis in a dog

A case of panuveitis as a result of leptospiral infection in an 8-year-old Jack Russell Terrier is reported. Mild hyphema, aqueous flare, and partial serous retinal detachments were noted in both eyes on initial ophthalmic examination. The serum microscopic agglutination testing for Leptospira serovarieties revealed titers of 1 : 12 800 for Leptospira canicola and 1 : 200 for Leptospira icterohemorrhagiae. With medical therapy, the panuveitis resolved and functional vision was regained. Four weeks after the initial presentation, convalescent titers were 1 : 200 for L. canicola and 1 : 100 for L. icterohemorrhagiae. The incidence of leptospirosis, along with difficulties diagnosing, and current medical therapies for this disease are also discussed.     

Leptospirosis in a British domestic cat

A leptospire was isolated from thoracic fluid, aqueous humour, and kidney of a cat, which at gross post-mortem had widespread haemorrhages and excess straw-coloured fluid in the thoracic and peritoneal cavities.
Histopathological examinations revealed severe centrilobular necrosis of the liver, and vascular lesions with haemorrhage were present in lung and brain.
Spirochaetes were demonstrable in lung, kidney and brain by silver impregnation techniques.
Strong fluorescence was observed in lung, liver, brain and kidney with bratislava antiserum.     

Mammary fibroadenoma in a lamb

A fibroadenoma was diagnosed in the left udder of a 3-month-old female Chios lamb. No recurrence was observed after surgery. Grossly, the tumor had a whitish-gray lobular appearance, and the lobules were interlaced with thin septa. Microscopically, the tumor was composed of proliferating fibroepithelial tissue, including differentiated ducts lined by whorls and interlacing bundles of abundant loose fibrovascular stroma. Immunohistochemistry revealed the ductal epithelium to be positive for pancytokeratin (AE1/AE3) and loose fibrovascular stroma was positive for vimentin and basal cells covering the ductal epithelium of alpha-smooth-muscle actin. Immunostaining for the estrogen and progesterone receptors was negative. A diagnosis of mammary fibroadenoma was made based on the histological and immunohistochemical findings.     

Intestinal polyps in a lamb

Eight pedunculated jejunal polyps 4–13mm in diameter were found in a 3 to 5-month-old lamb during routine meat inspection at an export slaughterhouse in Canterbury. Histological examination revealed papilliform growths consisting of hyperplastic villi with numerous developmental stages of coccidia-like organisms in the epithelial cells of the polyps' mucosa. It is suggested that this specimen represents an uncommon manifestation of chronic ovine coccidiosis.