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Geographical origins of the calf fecal samples. We compared the characteristics of C. parvum from the northernmost prefecture (Hokkaido) with those from the southernmost prefecture (Okinawa) of Japan. Sample collection sites in Hokkaido were Ashoro, Urahoro, and Hiroo. Those in Okinawa were Ishigakijima, Iriomotejima, and Kuroshima Islands.
