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Occurrence and genetic typing of infectious hematopoietic necrosis virus in Kamchatka, Russia

January 1, 2007

Infectious hematopoietic necrosis virus (IHNV) is a well known rhabdoviral pathogen of salmonid fish in North America that has become established in Asia and Europe. On the Pacific coast of Russia, IHNV was first detected in hatchery sockeye from the Kamchatka Peninsula in 2001. Results of virological examinations of over 10 000 wild and cultured salmonid fish from Kamchatka during 1996 to 2005 revealed IHNV in several sockeye salmon Oncorhynchus nerka populations. The virus was isolated from spawning adults and from juveniles undergoing epidemics in both hatchery and wild sockeye populations from the Bolshaya watershed. No virus was detected in 2 other water-sheds, or in species other than sockeye salmon. Genetic typing of 8 virus isolates by seguence analysis of partial glycoprotein and nucleocapsid genes revealed that they were genetically homogeneous and fell within the U genogroup of IHNV. In phylogenetic analyses, the Russian IHNV sequences were indistinguishable from the sequences of North American U genogroup isolates that occur throughout Alaska, British Columbia, Washington, and Oregon. The high similarity, and in some cases identity, between Russian and North American IHNV isolates suggests virus transmission or exposure to a common viral reservoir in the North Pacific Ocean. Inter-Research 2007.

Publication Year 2007
Title Occurrence and genetic typing of infectious hematopoietic necrosis virus in Kamchatka, Russia
DOI 10.3354/dao075001
Authors S.L. Rudakova, Gael Kurath, E.V. Bochkova
Publication Type Article
Publication Subtype Journal Article
Series Title Diseases of Aquatic Organisms
Index ID 70029708
Record Source USGS Publications Warehouse
USGS Organization Western Fisheries Research Center