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1 January 2001 Saprolegniosis in salmonids and their eggs in Japan
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An epizootic of the fungal infection saprolegniosis that occurred in freshwater-cultured salmons and their eggs at some hatcheries in Hokkaido (Japan) was investigated. In almost all cases, the initial clinical sign was characterized by the growth of cotton-like mycelia on the fishs' body surface, especially the head, adipose fin, and caudal fin, but the mycelia were not visible to the naked eye in the internal organs. Thirty-three strains isolated from lesions were classified in the genus Saprolegnia according to their morphological and biological characteristics on hemp seed cultures at various temperatures. Fifteen of the strains were identified as Saprolegnia parasitica, 16 were identified as S. salmonis, and two were identified as S. australis.

Hussein, Hatai, and Nomura: Saprolegniosis in salmonids and their eggs in Japan
Mortada M. A. Hussein, Kishio Hatai, and Tetsuichi Nomura "Saprolegniosis in salmonids and their eggs in Japan," Journal of Wildlife Diseases 37(1), 204-207, (1 January 2001).
Received: 5 November 1999; Published: 1 January 2001

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