eCite Digital Repository

Experimentally induced marine flexibacteriosis in Atlantic salmon smolts Salmo salar. II. Pathology

Citation

van Gelderen, R and Carson, J and Nowak, B, Experimentally induced marine flexibacteriosis in Atlantic salmon smolts Salmo salar. II. Pathology, Diseases of Aquatic Organisms, 95, (2) pp. 125-135. ISSN 0177-5103 (2011) [Refereed Article]


Preview
PDF
Restricted - Request a copy
2Mb
  

Copyright Statement

Copyright 2011 Inter-Research

DOI: doi:10.3354/dao02329

Abstract

ABSTRACT: The fish disease marine flexibacteriosis is characterised by necrotic lesions on the body, head, fins, and occasionally gills, with erosive lesions on the external surface as the prominent clinical sign. In Australia, the main species affected are Atlantic salmon Salmo salar and rainbow trout Oncorhynchus mykiss in sea-cage culture in Tasmania. Using a dose-dependent trial to determine pathology, 2 forms of the disease were noted in Atlantic salmon. The acute form occurs within 2 to 3 d after inoculation at high doses (1 108 cells ml1) and is characterised by the disintegration of the epithelium. The chronic form of the disease began as small superficial blisters of the epidermis, which develop into ulcerative lesions that leave musculature exposed. The predominant lesion sites were the dorsum and pectoral fins. Jaws were commonly affected, and gill necrosis was also noted. Behaviour of Atlantic salmon as well as the conditions under which they were kept contribute to the size and distribution of lesions observed. Lack of an inflammatory response in pathology and rapid and destructive mortalities observed in higher inoculum doses suggested a role of toxins in the pathogenesis of Tenacibaculum maritimum. This is the first study to examine the development of marine flexibacteriosis lesions and to utilise immunohistochemistry to verify that the bacteria observed in histology was T. maritimum.

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:Aquaculture Fin Fish (excl. Tuna)
Author:van Gelderen, R (Ms Rebecca van Gelderen)
Author:Nowak, B (Professor Barbara Nowak)
ID Code:71999
Year Published:2011
Web of Science® Times Cited:4
Deposited By:NC Marine Conservation and Resource Sustainability
Deposited On:2011-08-18
Last Modified:2017-07-26
Downloads:1 View Download Statistics

Repository Staff Only: item control page