M. cerebralis an fara gano shi ne a New Zealand a shekarar 1971. An gano kwayar cutar ne kawai a koguna a Tsibirin Kudancin, nesa da mafi mahimmancin wuraren kiwon kifin. Bugu da ƙari, nau'ikan salmonid da ake kiwo a cikin kifin kifin a New Zealand suna da ƙarancin kamuwa da cuta, kuma ba a nuna kwayar cutar ta shafi salmonids na gida ba. Muhimmin tasirin kai tsaye na kasancewar kwayar cutar shine takunkumin keɓewa da aka sanya kan fitar da kayayyakin kifin kifi zuwa Ostiraliya. Tambaya: A waɗanne wurare ne M. cerebralis yake?
koguna a tsibirin Kudancin