Journal of the Japan Veterinary Medical Association
Online ISSN : 2186-0211
Print ISSN : 0446-6454
ISSN-L : 0446-6454
Perihypophyseal Abscess in a Cow Caused by Actinomyces pyogenes
HITOMI YOSHIOKAMASAHARU TAKAYANORIYUKI NANBA
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1988 Volume 41 Issue 9 Pages 663-665

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Abstract

In March of 1986, a cow on a dairy farm in Fukuoka Prefecture became ill displaying mainly nervous symptoms. She was treated with antibiotics but later slaughtered because of a poor prognosis. The results obtained by the hematological and biochemical examinations suggested a bacterial infection. An autopsy revealed the formation of a pigeon-egg sized abscess in the bottom of the brain. Histologically, necrosis, intense infiltration of neutrophils and bacterial clumps were observed around the hypophysis. Actinomyces pyogenes (A. pyogenes) was isolated from the lesion. A serological survey on A. pyogenes infection was performed with other cows on the same farm. As a result, A. pyogenes protease antibody was detected in 17 out of 19 cows.

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