Oncorhynchus masou virus disease (OMVD) is an economically significant disease of farmed salmonid fish (salmon and rainbow trout) in Japan. This infection also occurs in wild fish. In young fish, OMVD is a systemic disease with a high mortality rate. Surviving salmon often develop cutaneous tumors, particularly around the mouth. Symptomatic and asymptomatic carriers can spread the virus to uninfected stocks.
Iowa State University
Iowa State University Center for Food Security and Public Health, "Oncorhynchus masou Virus Disease" (2007). Center for Food Security and Public Health Technical Factsheets. 97.