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DAO
Diseases of Aquatic Organisms

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DAO 34:205-210 (1998)  -  doi:10.3354/dao034205

Cochliopodium minus, a scale-bearing amoeba isolated from organs of perch Perca fluviatilis

I. Dyková*, J. Lom, B. Machácková

Institute of Parasitology, Academy of Sciences of the Czech Republic, CZ-370 05 Ceské Budejovice, Czech Republic
*E-mail: iva@paru.cas.cz

ABSTRACT: A scale-bearing amoeba isolated from gills and other organs of perch Perca fluviatilis Linnaeus, 1758 was identified as Cochliopodium minus Page, 1976. This assignment was suggested by light microscopy and confirmed by ultrastructural study of both the strain isolated from perch and the environmental strain of C. minus (CCAP 1537/1A) serving as a control. This has been the first electron-microscopic definition of C. minus and, in addition, the first identification of an amoeba with a theca-like cover found to infect fish. The ability of the fish strain of C. minus to colonize gills and also internal body organs was proved experimentally.


KEY WORDS: Free living amoebae · Cochliopodium minus · Ultrastructure · Systemic infection of fish


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