Disease Surveillance

Ichthyophonus spp. are perhaps the most economically and ecologically important parasites of wild marine fish in the world.

Low early marine survival rates of Puget Sound steelhead ( Oncorhynchus mykiss ), the state fish of Washington, have contributed to its dramatic population decline and current listing as a “Threatened Species” under the Endangered Species Act. Determining the cause(s) of this elevated mortality remains a primary objective of the Salish Sea Marine Survival Project, a large US / Canada effort...

Using an approach that involves a combination of field- and laboratory-based studies, we are investigating fish health factors that may be contributing to the failed recovery of Pacific herring populations in Prince William Sound, AK. Field studies are providing infection and disease prevalence data to inform the population models, serological data that indicate the prior exposure history and...

Protocols for the Detection of Renibacterium salmoninarum in salmon

Viruses occur in many cultured and wild stocks of fish. William Batts collaborates with many government, state, tribal, and private research and diagnostic laboratories to aid in identification of these unknown replicating agents of uncertain pathogenicity. Typically, viruses can be replicated in a variety of fish cell lines and investigated at several temperatures to see if the cytopathic effect...

There has been long history of disease outbreaks and economic losses in wild and farmed carp species due to SVCV. Formerly thought to be restricted to Europe and Asia, SVCV was detected for the first time in North America from diseased koi at a North Carolina fish farm in 2002, and there were extensive eradication efforts with 135,000 fish euthanized in addition to the ~15,000 that died from the...

Fish Virus - Viral Hemorrhagic Septicemia Virus (VHSV)

Species Studied - Pacific Herring ( Clupea pallasii )

Species Studied - Pacific Halibut ( Hippoglossus stenolepis )

At the request of the State of Washington, the Northwest Indian Fisheries Commission (NWIFC) and the US Fish and Wildlife Service (USFWS), the Western Fisheries Research Center has been providing technical advice and conducting research regarding the emergence of IHNV in the watersheds of coastal Washington State.

Fish Diseases - Emerging Viruses

Fish Diseases - Viral Hemorrhagic Septicemia (VHS)