About the Authors
Laboratory of Parasitic Diseases, National Institute of Animal Health, National Agricultural and Food Research Organization, Tsukuba, Ibaraki, Japan
Department of Emerging Infectious Diseases, School of Veterinary Medicine, University of Kagoshima, Kagoshima, Japan
The authors have declared that no competing interests exist.
Conceived and designed the experiments: MKI NT KF. Performed the experiments: MKI NT TM MAA XH TH. Analyzed the data: MKI NT KF. Wrote the paper: MKI NT KF.