Journal of the Japan Veterinary Medical Association
Online ISSN : 2186-0211
Print ISSN : 0446-6454
ISSN-L : 0446-6454
A Case of Sheep-associated Malignant Catarrhal Fever in Cattle and Subclinical Infection in Cattle Kept with the Affected Animals
Kiyohito KATSURAGIKazunori NAKAMURAKasumi KASAHARAHidetoshi TANIMURATomoko NISHIMORIKunitoshi IMAI
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2003 Volume 56 Issue 12 Pages 793-797

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Abstract

A case of sheep-associated malignant catarrhal fever (SA-MCF) was observed in one Japanese Black cow on a beef ranch where cattle and sheep were kept together. The animal had pyrexia, anorexia, and a cough and died in 5 days. Histological investigation showed angiitis in the major organs of the dead animal. Ovine herpes virus-2 (OvHV-2) genes were detected in cells from these organs. None of the 25 other head of cattle kept with the affected one showed similar symptoms. Polymerase chain-reaction checks of peripheral-blood leucocytes (PBL) showed OvHV-2 genes in 10 out the 25. Successive checks made at 2-month intervals over 11 and 13 months detected OvHV-2 genes consistently in the PBL of 2 animals. This suggests that at least 10 head of cattle were subclincally affected by SA-MCF and that 2 head were persistently infected by OvHV-2 during the observation period.

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