NEW EYE DISEASE IN PEN-REARED CHINOOK SALMON CAUSED BY METACESTODES OF GILQUINIA SQUALI (TRYPANORHYNCHA)

• Main Authors: M.L. Kent, L. Margolis, J.W. Fournie
• Format: Text
• Language: unknown
• Published: 2005
• Subjects: British Columbia; Canada; Northeast Atlantic
• Online Access: http://oaspub.epa.gov/eims/eimsapi.dispdetail?deid=46166

Eye infections by metacestodes of Gilcruinia squali (Cestoda: Trypanorhyncha) caused mortality in seawater netpen reared chinook salmon, ncorhynchus tshawytscha, at two locations in British Columbia, Canada. ortality associated with the disease was approximately 105 at one site and undetermined at the second site. he metacestode was found in the vitreous humor of moribund fish with eye lesions, while healthy fish from the same pen exhibited neither reciter eye lesions nor the infection. he lesions were characterized by retinal folding and apparent retinal duplication, cataractous changes, and in severe cases the cornea ruptured and the lens was extruded. lthough the metacestode is common in the eyes of whiting, erlangius merlangus, in the northeast Atlantic region, this is the first report of the infection in a salmonid fish.