An outbreak of fowl cholera in wild ducks (Rosyibilled pochard) in Japan.

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  • ベニハシガモ(Rosyibilled pochard)における家禽コレラの発生
  • ベニハシガモ(Rosyibilled pochard)における家禽コレラの発生〔英文〕
  • ベニハシガモ Rosyibilled pochard ニ オケル カキン コレ

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Abstract

An outbreak of fowl cholera occurred in a wild duck (Rosyibilled pochard) flock at a zoological garden in Gunma prefecture of Japan in March and May of 1983. Twenty-eight (68%) of 41 birds in the flock died of an acute disease. Pasteurella multocida was isolated in pure culture from heart, lung, liver, kidney and spleen of a representative bird. Serovars of the isolate were identified as Carter's capsular type A, Heddleston's type 3, and Namioka's type 8:A. Multiple petechiae were macroscopically observed in the heart, lung, liver, spleen, subcutaneous fatty tissues, and nervus vagus of ischium and neck of the bird. Microscopically, multiple areas of necrosis and bacterial aggregates were apparent in the liver and spleen, and thrombi and bacteria were apparent in the heart, lung and some nervous tissues. These etiological and pathological findings indicated that the infection was typical fowl cholera. This is the first report on the occurrence of fowl cholera in wild waterfowl in Japan.

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