| infectious haematopoietic necrosis virus genogroup-specific virulence mechanisms in sockeye salmon, oncorhynchus nerka (walbaum), from redfish lake, idaho. | characterization of infectious haematopoietic necrosis virus (ihnv) field isolates from north america has established three main genogroups (u, m and l) that differ in host-specific virulence. in sockeye salmon, oncorhynchus nerka, the u genogroup is highly virulent, whereas the m genogroup is nearly non-pathogenic. in this study, we sought to characterize the virus-host dynamics that contribute to genogroup-specific virulence in a captive stock of sockeye salmon from redfish lake in idaho. juve ... | 2009 | 19486239 |