MPR’s Bob Kelleher reports that a deadly fish disease has been confirmed in Lake Superior. Researchers have identified the disease known as VHS in fish taken from four places in the lake, including the Duluth-Superior Harbor. It is not known yet if that means fish populations are at risk in the big lake.

Researchers have been watching Lake Superior since at least 2007’ for signs of viral hemorrhagic septicemia - a disease believed associated with salt water fish that's been quickly moving through the fresh water Great Lakes. VHS is blamed for some spectacular fish kills elsewhere that have covered beaches with wind-rows of rotting dead fish.