1. Laboratory of Small Animal Clinics, Veterinary Teaching Hospital, Azabu University, Sagamihara, Kanagawa, Japan
2. Laboratory of Parasitology, School of Veterinary Medicine, Azabu University, Sagamihara, Kanagawa, Japan
3. Tachibana Animal Hospital, Matsuyama, Ehime, Japan
4. Laboratory of Microbiology and Immunology, School of Medicine, Fukuoka University, Fukuoka, Fukuoka, Japan
5. Laboratory of Parasitology, School of Life and Environmental Science, Azabu University, Sagamihara, Kanagawa, Japan
6. Department of Parasitology, National Institute of Infectious Diseases, Toyama, Tokyo, Japan