by K Seitz bodies of freshwater such as the Great Lakes. (Karas, 1997). ... with bull trout in their introduced range, ... There are many more diseases and parasites that.. Research Interests: Salmon diseases, Myxozoan parasites, Host resistance ... Courses Taught: MB 491/591 Fish Disease, Salmonid Disease Workshop; MB 507 ... as well as conducting surveys for parasites of native and introduced fishes. ... trout infected by two genotypes of the myxozoan parasite Ceratonova shasta.. Most worm