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1 October 2010 MASS MORTALITY ASSOCIATED WITH KOI HERPESVIRUS IN WILD COMMON CARP IN CANADA
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Abstract

Koi herpesvirus (KHV) was identified as being associated with more than one mortality event affecting common carp in Canada. The first was an extensive mortality event that occurred in 2007 in the Kawartha Lakes region, Ontario, affecting Lakes Scugog and Pigeon. Fish had branchial necrosis and hepatic vasculitis with an equivocal interstitial nephritis. Several fish also had branchial columnaris. Subsequent mortality events occurred in 2008 in additional bodies of water in south-central Ontario, such as Lake Katchewanooka and outside of Ontario in Lake Manitoba, Manitoba. Koi herpesvirus was detected in fish submitted for examination from all of these lakes by polymerase chain reaction (PCR), and sequence of the PCR product revealed 100% homology to KHV strains U and I. Real-time PCR analysis of KHV-infected wild carp revealed viral loads ranging from 6.02×101 to 2.4×106 copies μg−1 host DNA. This is the first report of KHV in Canada.

Kyle A. Garver, Lowia Al-Hussinee, Laura M. Hawley, Tamara Schroeder, Sandra Edes, Veronique LePage, Elena Contador, Spencer Russell, Stephen Lord, Roselynn M. W. Stevenson, Brian Souter, Elizabeth Wright, and John S. Lumsden "MASS MORTALITY ASSOCIATED WITH KOI HERPESVIRUS IN WILD COMMON CARP IN CANADA," Journal of Wildlife Diseases 46(4), 1242-1251, (1 October 2010). https://doi.org/10.7589/0090-3558-46.4.1242
Received: 12 March 2010; Accepted: 1 July 2010; Published: 1 October 2010
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