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Experimental induction of gill disease in Atlantic salmon Salmo salar smolts with Tenacibaculum maritimum

Citation

Powell, MD and Carson, J and van Gelderen, R, Experimental induction of gill disease in Atlantic salmon Salmo salar smolts with Tenacibaculum maritimum, Diseases of Aquatic Organisms, 61, (3) pp. 179-185. ISSN 0177-5103 (2004) [Refereed Article]

DOI: doi:10.3354/dao061179

Abstract

An experimentally induced bacterial infection of marine Atlantic salmon Salmo salar smolt gills was developed using strains of Tenacibaculum maritimum originally isolated from disease outbreaks in Tasmania. The gills of salmon were inoculated with a high concentration of bacteria (4 × 1011 cells per fish) of either strain 00/3280 or 89/4747 T. maritimum. Gentle abrasion of the gills was used to enhance the progression of gill disease. One strain (00/3280) was highly pathogenic, causing morbidity and mortality within 24 h post-inoculation, and produced acute focal branchial necrosis associated with significant increases in plasma osmolality and lactate concentration compared with controls (non-inoculated) or strain 89/4747-inoculated fish. There were no differences in the whole body net ammonium flux between control (non-inoculated) and strain 00/3820-inoculated fish. Gill abrasion resulted in acute telangiectasis and focal lamellar hyperplasia in all fish regardless of bacterial inoculation. This work provides the basis of a challenge model suitable for investigating the pathophysiological processes associated with acute branchial necrosis in marine fish, suggesting that osmoregulatory and possibly respiratory dysfunction are the primary consequences of infection.

Item Details

Item Type:Refereed Article
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Fish Pests and Diseases
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Aquaculture
Objective Field:Fisheries - Aquaculture not elsewhere classified
Author:Powell, MD (Dr Mark Powell)
Author:Carson, J (Dr Jeremy Carson)
Author:van Gelderen, R (Ms Rebecca van Gelderen)
ID Code:30096
Year Published:2004
Web of Science® Times Cited:18
Deposited By:TAFI - Aquaculture
Deposited On:2004-08-01
Last Modified:2005-05-02
Downloads:0

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