Open AccessExperimental Infection of Rainbow Trout, Oncorhynchus mykiss , and Hybrid Striped Bass, Morone chrysops ♂ × Morone saxatilis ♀, with Viral Hemorrhagic Septicemia Virus Genotype IVb
Author(s) -
Cornwell Emily R.,
Penner Eileen A.,
Getchell Rodman G.,
Groocock Geoffrey H.,
Bowser Paul R.
Publication year - 2013
Publication title -
journal of the world aquaculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0893-8849
DOI - 10.1111/jwas.12072
Subject(s) - biology , morone , rainbow trout , bass (fish) , aquaculture , fishery , morone saxatilis , host (biology) , virus , zoology , veterinary medicine , virology , ecology , fish <actinopterygii> , medicine
The emergence of a new sublineage of viral hemorrhagic septicemia virus ( VHSV ) within the Laurentian Great Lakes has caused concern for aquaculture in the United States. Because of the occurrence of VHSV in a new geographic location, new host species have been identified and the complete host range has not been determined. This study confirmed the high resistance of rainbow trout, Oncorhynchus mykiss , to VHSV type IVb infection. In addition, the experimental susceptibility of hybrid striped bass, Morone chrysops ♂ × Morone saxatilis ♀, to VHSV type IVb infection was examined but determined to be highly dependent on age of fish and exposure temperature. No mortality was observed in adult fish infected via intraperitoneal ( IP ) injection at 15 C, whereas yearling fish infected via IP injection under the same conditions experienced 20.8% mortality. Among yearling fish infected via IP injection, mortality increased to 100% when exposure to VHSV occurred at 10 C. An LD 50 for yearling hybrid striped bass exposed to VHSV at 10 C by IP injection was determined to be 1.4 × 10 4 pfu ( SE = 2.1). Thus, at 10 C, yearling hybrid striped bass experience a high mortality when exposed to VHSV IVb by IP injection.