Publication Abstract

Chloromyxum truttae Legér, 1906 infection in cultured salmonids from Finland

S.W. Feist and P. Rintamäki

Chloromyxum truttae Legér, 1906 is a common parasite infecting the gallbladder of brown trout (Salmo trutta L.) and other salmonids (Alvarez-Pellitero, Pereira-Bueno & Gonzalez-Lanza, 1982; Lom & Dykova, 1992). Wild fish do not generally exhibit gross clinical signs, although in heavy infections the bile may appear abnormally dark and viscous (Poynton & Bennett, 1985). Cultured fish, especially pond-reared stocks, may be more severely affected and appear emaciated with yellowish discolouration of the skin and fins. Internally, hypertrophy of the gallbladder, pale liver and inflammation of the intestine are the main presenting features, and mortalities may result (Shulman, 1966).

The purpose of this note is to report the occurrence of C. truttae in salmonid smolts reared at 4 fish farms (A to D) in northern Finland which produce approximately 1.2 million fish per annum for re-stocking purposes.

Reference:

S.W. Feist and P. Rintamäki, 1994. Chloromyxum truttae Legér, 1906 infection in cultured salmonids from Finland. Bulletin of the European Association of Fish Pathologists, 14(2): 51