File:Worldwide distribution of Mcerebralis.png
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Distribution of the fish parasite as reported in Hoffman, G. L. 1990. Myxobolus cerebralis, a worldwide cause of salmonid whirling disease. Journal of Aquatic Animal Health 2: 30–37. Map made by en:User:Vardion and modified by en:user:Petaholmes and en:user:Anilocra. PNG-optimized by John Owens (talk).
Parasite discovered in Norway in 1971 Hastein, T. 1971. The occurrence of whirling disease (Myxosomiasis) in Norway. Acta Veterinaria Scandinavica 12:297-299
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