The deadly fish disease viral hemorrhagic septicemia virus (VHSV) has been found in Lake Superior by Cornell researchers and the U.S. Geological Survey. They tested 874 different fish from seven different sites and found positive results in fish from Paradise and Skanee Michigan, and in Superior Bay Wisconsin.
VHSV was initially found in the Great Lakes in 2003. While the virus is not contagious to humans it is very contagious to other fish. Even fish that survive the disease will remain carriers of the disease throughout their lives. The disease causes hemorrhaging of the liver, spleen, and intestines and eventually leads to internal organ failure in fish. Since 2008 and 2009 did not produce any major fish kills from VHSV, researchers are looking into causal connections between the presence of stress on the fish and mortality rates.
Deadly fish virus now found in all Great Lakes
VHSV Fact Sheet
Important Information for Anglers