Isolation of <i>Mycobacterium avium</i> Complex from a Thoroughbred Racehorse with Fatal Pneumonia

DOI
  • ANZAI Tohru
    Epizootic Research Station, Equine Research Institute, Japan Racing Association
  • KAMADA Masanobu
    Epizootic Research Station, Equine Research Institute, Japan Racing Association
  • KANEMARU Takumi
    Epizootic Research Station, Equine Research Institute, Japan Racing Association
  • OIKAWA Masa-aki
    Equine Research Institute, Japan Racing Association

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Other Title
  • 致死的肺炎を発症した競走馬からの<i>Mycobacterium avium</i> complexの分離

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Description

A four-year-old Thoroughbred racehorse suffering from fatal pneumonia was presented to the Veterinary Clinic of Miho Training Center, Japan Racing Association and anesthetized for euthanasia for autopsy. The main gross lesions at postmortem examination were many large and small granulomatous nodules in the lung, small nodules in the liver, cloudy swelling of the kidney, enlargement of the lymph nodes in the whole body and atrophy of the thymus. A large number of acid-fast bacteria, approximately 1010CFU/g, was isolated in pure form from the nodules of the lung and were bacteriologically identified as Mycobacterium avium complex. This is the first case diagnosed bacteriologically and pathologically as granulomatous pneumonia due to M. avium complex in Japan.

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