Trypanosomes from mule deer, Odocoileus hemionus in Wyoming

Examination of mule deer, Odocoileus hemionus, from Wyoming in Spring, 1974 (8) and in Winter of 1974-75 (8) revealed trypanosomes in all 16 deer. Spring samples showed dividing epimastigotes as well as normal bloodstream forms. Winter samples showed only normal blood stream forms. These differences are considered to be seasonally related.