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Equine Vet J. 1997 May;29(3):178-85.

Equine viral arteritis in newborn foals: clinical, pathological, serological, microbiological and immunohistochemical observations.

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1
Department of Pathology, Cornell University, College of Veterinary Medicine, Ithaca, New York 14853, USA.

Abstract

Clinical, pathological, immunohistochemical, serological and microbiological findings are described for 2 geographically and temporally distinct equine arteritis virus (EAV) epidemics in newborn foals. Outbreak A occurred at a commercial Standardbred breeding facility; Outbreak B began in a group of research animals. Clinical signs were severe and primarily referable to the respiratory tract. Fever and leucopenia and/or thrombocytopenia were observed in foals surviving for more than 24 h. The most common gross pathological findings were limited to the respiratory tract. Common histopathological findings included interstitial pneumonia, lymphocytic arteritis and periarteritis with fibrinoid necrosis of the tunica media. Renal tubular necrosis was noted in 2 foals. Immunoperoxidase histochemistry combined with virus isolation was diagnostic in all cases.

[Indexed for MEDLINE]

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