1. Laboratory of Animal Health, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Japan
2. Laboratory of Veterinary Biochemistry, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Japan
3. Animal Research Center, Agricultural Research Department, Hokkaido Research Organization, Shintoku, Japan
4. Laboratory of Veterinary Bacteriology, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Japan
5. Laboratory of Food Microbiology and Food Safety, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Japan
6. Laboratory of Applied Biochemistry, College of Agriculture, Food and Environment Sciences, Rakuno Gakuen University, Ebetsu, Japan
7. Center for Animal Disease Control, University of Miyazaki, Miyazaki, Japan