Health monitoring of wild fish

The Norwegian Veterinary Institute monitors the occurrence and distribution of pathogens in wild salmonids.

The overarching goal of the health monitoring program for wild anadromous salmonids is to examine the occurrence and sources of pathogenic agents in wild salmonids. The National Veterinary Institute is responsible for the freshwater phase of the program while the Institute of Marine Research is responsible for the marine phase.


Gill disease is a significant problem in Atlantic salmon farming in Norway, both in production of juveniles on land and in on-growing sites in the sea. A number of infectious agents are associated with gill disease in farmed salmon and rainbow trout, and our knowledge is continuously increasing.

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