Detection of infectious hematopoietic necrosis virus in river water and demonstration of waterborne transmission
In a study of the possible role of waterborne infectious haematopoietic necrosis virus in transmission of the disease among spawning sockeye salmon, Oncorhynchus nerka (Walbaum), both infection rates and virus titres were higher in fish held at high density in a side channel than in fish in the adjacent river. Virus was never isolated from river water, but was found in water from the side channel at levels ranging from 32.5 to 1600 plaque-forming units (p.f.u.)/ml. Uninfected yearling sockeye salmon held in a box in the side channel developed localized gill infections with IHN virus. The disease did not progress to the viscera until a threshold titre of about 105 p.f.u./g was reached in the gill. The effectiveness of the gill as a barrier limiting development of systemic infections means that waterborne IHN virus probably does not greatly increase the infection rate in a sockeye salmon population during spawning.
|Publication Subtype||Journal Article|
|Title||Detection of infectious hematopoietic necrosis virus in river water and demonstration of waterborne transmission|
|Series title||Journal of Fish Diseases|
|Contributing office(s)||Alaska Science Center|
|Other Geospatial||Cedar River|
|Google Analytic Metrics||Metrics page|