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DAO 58:99-110 (2004)
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Abstract
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Experimental infection of rainbow trout Oncorhynchus mykiss with viral haemorrhagic septicaemia virus isolates from European marine and farmed fishes
Helle Frank Skall1,*, Wilhelmina J. Slierendrecht1,3, Julie A. King2, Niels Jørgen Olesen1
1Danish Institute for Food and Veterinary Research, Department of Poultry, Fish and Fur Animals, Hangøvej 2, 8200 Århus N, Denmark
2FRS Marine Laboratory, PO Box 101, Victoria Road, Aberdeen AB11 9DB, UK
3Present address: BioMar A/S, Mylius Erichsensvej 35, 7330 Brande, Denmark
*Email: hfm@dfvf.dk
ABSTRACT: The susceptibility of rainbow trout Oncorhynchus mykiss to infection with various isolates of viral haemorrhagic septicaemia virus (VHSV) was examined. A total of 8 experiments with rainbow trout ranging from 0.6 to 6.2 g was
conducted for 139 isolates originating from wild marine fishes in European waters (115 isolates), farmed turbot from Scotland and Ireland (2 isolates), and farmed rainbow trout (22 isolates). The isolates were tested by immersion and/or intraperitoneal
injection either as pooled or single isolates. The isolates from wild marine fishes did not cause mortality by immersion while some of the isolates caused mortality when injected. All VHSV isolates from farmed rainbow trout caused significant mortality by
immersion. Currently, pathogenicity trials are the only way to differentiate VHSV isolates from wild marine fishes and farmed rainbow trout. The 2 farmed turbot isolates did not cause mortality by immersion, supporting the view that they originated from
the marine environment.
KEY WORDS: VHSV · Infection trials · Rainbow trout · Pathogenicity
Full text in pdf format
Published in DAO Vol.
58, No. 2-3
(2004) on March 10
Print ISSN: 0177-5103; Online ISSN: 1616-1580.
Copyright © Inter-Research, Oldendorf/Luhe, 2004
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