Isozymes of chicken coccidia in Japan.

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Abstract
Genetic variations of the enzymes of chicken coccidia were examined by starch-gel electrophoresis. Six species of chicken coccidia examined could be characterized by zymographs of both lactate dehydrogenase (LDH) and glucose phosphate isomerase (GPI). Two of six field isolates of Eimeria tenella had GPI of different mobility from the others including the reference (laboratory) strain, although their LDH were identical, indicating that there existed at least two phenotypes of E. tenella strains in Japanese chicken flocks.