Biomedical subjects
Publications and source records attributed to E P Lane.
The 1st recorded histological evidence of chytridiomycete fungal infection in a free-ranging ranid amphibian in South Africa is presented. Literature on causes of a worldwide decline in amphibian populations is briefly reviewed.
A renal T-cell lymphoma with exclusive cerebral metastasis was diagnosed in a 5-year-old Staffordshire bull terrier bitch euthanased for aggression. This is the first recorded case of primary renal lymphoma in a dog. Immune suppression, due to chronic canine monocytic ehrlichiosis, may account for the unusual primary site and metastatic pattern of the tumour.
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An epizootic of flaccid trunk paralysis began in free-ranging Zimbabwean elephants (Loxodonta africana) on the southern shore of Lake Kariba in 1989. It involved a selective neuropathy of peripheral nerves supplying the trunk, with axon and myelin degeneration, muscle atrophy, compensatory hypertrophy, and fine endomyseal fibrosis, without inflammatory changes.
An outbreak of haemorrhagic septicaemia caused by Pasteurella multocida in beef cattle in Zimbabwe grazing effluent-irrigated pastures, is described. The outbreak occurred during the wet summer months and predisposing stress factors included excessive rainfall and unusual cold weather during the preceding month. History, clinical features and post-mortem findings were consistent with reports of the disease from other countries, except that meningitis was also a constant feature. Morbidity approached 77% and mortality 5 per cent. Prophylactic treatment and vaccination with a killed bacterin together with a return of warmer and drier weather were probably important in halting the outbreak.
A young dog with progressive neurological signs was humanely killed by the injection of barbiturate for postmortem examination. Lesions in the nose, lung, pancreas, lymph nodes, kidneys and the meninges were heavily infiltrated with Cryptococcus neoformans. In addition, haemangiosarcoma was detected in the right atrium. The finding of systemic mycosis and neoplasia together in a young dog suggests an immunosuppressed state.
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