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Hepeviruses of fish

August 1, 2016

Originally reported from California, the cutthroat trout virus (CTV) has now been isolated from eight species of salmonids in North America. Early work focused on the replication and physical characteristics of the small, round virus, but not until 20 years later was it determined to be most closely related to viruses causing hepatitis E in humans or infecting avian and mammalian hosts. The genome of CTV consists of 7269 nucleotides of positive-sense, single-stranded RNA with a genome organization similar to other members of the family Hepeviridae, although the amino acid sequence identity appears low enough to support creation of a novel genus. While CTV has not been associated with acute disease in fish, the virus was able to form persistently infected cell cultures that may aid research in treatment of hepatitis E-like viruses affecting humans or other animals. Interestingly, trout exposed to CTV were protected for about a month against subsequent exposure to Infectious hematopoietic necrosis virus. Replicating agents suspected to be CTV can be confirmed by polymerase chain reaction (PCR) and sequencing.

Citation Information

Publication Year 2016
Title Hepeviruses of fish
DOI 10.1016/B978-0-12-801573-5.00024-3
Authors William N. Batts
Publication Type Book Chapter
Publication Subtype Book Chapter
Series Title
Series Number
Index ID 70175114
Record Source USGS Publications Warehouse
USGS Organization Western Fisheries Research Center