Perihypophyseal Abscess in a Cow Caused by <I>Actinomyces pyogenes</I>

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  • YOSHIOKA HITOMI
    Kitakyushu Livestock Hygiene Service Center, Prefecture of Fukuoka, Nakayoshida Kokuraminami Kitakyushu
  • TAKAYA MASAHARU
    Kitakyushu Livestock Hygiene Service Center, Prefecture of Fukuoka, Nakayoshida Kokuraminami Kitakyushu
  • NANBA NORIYUKI
    福岡県京都酪農業協同組合家畜診療所

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Other Title
  • <I>Actinomyces pyogenes</I>感染による乳用牛の下垂体周囲膿瘍の1例
  • Actinomyces pyogenes感染による乳用牛の下垂体周囲膿瘍の1例
  • Actinomyces pyogenes カンセン ニ ヨル ニュウヨウギュウ
  • Perihypophyseal Abscess in a Cow Caused by Actinomyces pyogenes

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Description

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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