1. Department of Biomedicine, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Hasama, Yufu, Oita 879-5593, Japan.
2. Laboratory of Parasitology, Faculty of Veterinary Medicine, Okayama University of Science, 1-3 Ikoinooka, Imabari, Ehime 794-8555, Japan.
3. Nagasaki Bio Park, 2291-1 Nakayamago, Seihicho, Saikai, Nagasaki, 851-3302, Japan.
4. Laboratory of Pathology, Faculty of Veterinary Medicine, Okayama University of Science, 1-3 Ikoinooka, Imabari, Ehime 794-8555, Japan.
5. Wildlife Research Center, Inuyama Campus, Kyoto University, 41-2 Kanrin, Inuyama, Aichi 484-8506, Japan.