Inland Fisheries Ireland is working with the Fish Health Unit in the Marine Institute to sample live salmon in affected rivers to determine the cause of the skin disease.
Until the cause of the disease has been determined and the risk of spreading the disease established, affected salmon should not be removed from the water.
Any anglers who capture salmon with these symptoms are advised to follow normal biosecurity procedures and disinfect tackle, waders and equipment.
Returning Salmon in Irish Rivers Showing Signs of Bleeding & Skin Ulceration (Afloat)