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Studies were conducted to determine the etiology of an epizootic disease occurring in fry and yearling brook trout (Salvelinus fontinalis); clinical signs, experimental infection, and pathological lesions suggested infectious pancreatic necrosis. Electron microscopy and physicochemical characteristics were used to identify the virus isolated from sick trout as IPN virus. The isolates showed only partial antigenic similarity to the reference strain IPN VR299. Increased susceptibility to IPN virus was observed in one genetic line of trout.
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Elazhary et al. (1976) studied this question.
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