Characteristics of Vagococcus salmoninarum isolated from diseased salmonid fish.
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.
Fish Health Unit, Department of Primary Industry and Fisheries, Tasmania, Australia.
L M
LM
Schmidtke
J
J
Carson
D000818:Animals; D001426:Bacterial Proteins / Q000032:analysis; D004591:Electrophoresis, Polyacrylamide Gel; D005393:Fish Diseases / Q000209:etiology / Q000382:microbiology*; D016908:Gram-Positive Bacterial Infections / Q000662:veterinary*; D006095:Gram-Positive Cocci / Q000302:isolation & purification*; D008826:Microbial Sensitivity Tests; D017686:Oncorhynchus mykiss / Q000382:microbiology; D010538:Peritonitis / Q000662:veterinary*; D012474:Salmon / Q000382:microbiology; D012487:Salmonidae / Q000382:microbiology*; D014337:Trout / Q000382:microbiology
D001426:Bacterial Proteins