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Infections of Edwardsiella tarda among Brook Trout in Quebec
Author(s) -
Uhland F. Carl,
Hélie Pierre,
Higgins Robert
Publication year - 2000
Publication title -
journal of aquatic animal health
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.507
H-Index - 52
eISSN - 1548-8667
pISSN - 0899-7659
DOI - 10.1577/1548-8667(2000)012<0074:ioetab>2.0.co;2
Subject(s) - edwardsiella tarda , aeromonas salmonicida , aeromonas hydrophila , biology , salvelinus , fontinalis , trout , outbreak , aeromonas , gill , microbiology and biotechnology , fishery , zoology , bacteria , fish <actinopterygii> , virology , genetics
Acute bacterial septicemia is commonly diagnosed in brook trout Salvelinus fontinalis of Quebec, Canada. The agents most commonly isolated include Aeromonas salmonicida (furunculosis), Aeromonas hydrophila (motile aeromonad septicemia), and Pseudomonas species. Septicemia in brook trout caused by the gram‐negative bacterium Edwardsiella tarda was diagnosed for the first time in the province of Quebec from two different fish farms producing stock for fee fishing establishments. Affected fish displayed nonspecific lesions associated with bacterial septicemia including hemorrhages on the gills and viscera and exophthalmia. Stress‐associated immunosuppression due to an increase in summer water temperatures and lack of precipitation were considered as primary causes of these disease outbreaks.