Characteristics of Vagococcus salmoninarum isolated from diseased salmonid fish
1994
Schmidtke, L.M. | Carson, J.
Isolates of the salmonid pathogen Vagococcus salmoninarum were recovered from Atlantic salmon, rainbow trout and brown trout with peritonitis. The phenotypes of these isolates and the type strain of Vag. salmoninarum NCFB 2777 were determined by morphological, biochemical and physiological tests and whole cell protein profiles by SDS-PAGE. There was a high level of phenetic similarity between the salmonid isolates and the type strain. The species forms short Gram-positive rods, hydrolyses L-pyrrolidonyl-beta-naphthylamide, is alpha-haemolytic on sheep's blood agar, grows at pH 9.6 and 10 degrees C but not at 40 degrees C or in 6.5% NaCl and is catalase-negative; a Lancefield group N antigen is not present. Vagococcus salmoninarum can be distinguished phenetically from similar fish pathogens including Carnobacterium piscicola, Enterococcus seriolicida and Lactococcus piscium.
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