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Salmonid gill bacteria and their relationship to amoebic gill disease


Bowman, JP and Nowak, BF, Salmonid gill bacteria and their relationship to amoebic gill disease, Journal of Fish Diseases, 27, (8) pp. 483-492. ISSN 0140-7775 (2004) [Refereed Article]

DOI: doi:10.1111/j.1365-2761.2004.00569.x


16S ribosomal RNA gene analysis was used to assess the bacterial community associated with Atlantic salmon, Salmo salar L., gills which were either affected by amoebic gill disease (AGD) or were AGD-negative, in order to determine the role that bacteria may play in the development of AGD. AGD-positive specimens were either infected in the laboratory with Neoparamoeba pemaquidensis, the causative agent of AGD, or were obtained from commercial salmon cages. Samples from laboratory fish maintained in sea water possessed a marine-type community while field samples which had been treated by a series of freshwater baths possessed a more diverse community which included variable proportions of different bacterial ecotypes, including groups typically associated with soil, skin surfaces and faeces. Samples from fish infected with AGD in the laboratory and a sample from one of two salmon cage fish specimens were dominated by a phylotype belonging to the strictly marine bacterial genus Psychroserpens (family Flavobacteriaceae, phylum Bacteroidetes). The phylotype was not detected in any of the AGD-negative samples or in one of two AGD-positive samples obtained from fish subjected to temporary freshwater immersion. The possibility of certain Psychroserpens species as potential opportunistic pathogens associated with salmonid AGD is proposed.

Item Details

Item Type:Refereed Article
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Fisheries sciences
Research Field:Aquaculture
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - aquaculture
Objective Field:Fisheries - aquaculture not elsewhere classified
UTAS Author:Bowman, JP (Associate Professor John Bowman)
UTAS Author:Nowak, BF (Professor Barbara Nowak)
ID Code:29851
Year Published:2004
Web of Science® Times Cited:46
Deposited By:TAFI - Aquaculture
Deposited On:2004-08-01
Last Modified:2005-05-02

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