1. Laboratory of Veterinary Internal Medicine, College of Veterinary Medicine, Chungnam National University, Daejeon 305–764, Korea
2. Division of Malaria & Parasitic Diseases, Korea National Institute of Health, Korea Centers for Disease Control and Prevention, Osong-eup, Cheongwon-gun, Chungbuk 363–951, Korea
3. Laboratory of Microbiology, College of Medicine, Chungbuk National University, Cheongju 361–763, Korea