Experimental infection of rainbow trout Oncorhynchus mykiss with viral haemorrhagic septicaemia virus isolates from European marine and farmed fishes

Helle Frank Skall, W.J. Slierendrecht, J.A. King, Niels Jørgen Olesen

    Research output: Contribution to journalJournal articleResearchpeer-review

    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.
    Original languageEnglish
    JournalDiseases of Aquatic Organisms
    Volume58
    Issue number2-3
    Pages (from-to)99-110
    ISSN0177-5103
    DOIs
    Publication statusPublished - 2004

    Keywords

    • VHSV
    • infection trials
    • pathogenicity
    • rainbow trout

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