1. Wildlife Parasitology Research Laboratory, Department of Veterinary Microbiology and Immunology, University of California, Davis, California 95616, USA
2. Wildlife Investigations Laboratory, California Department of Fish and Game, Rancho Cordova, California 95670, USA
3. International Wildlife Veterinary Services, Inc.,1850 North Main Street, Salinas, California 93906, USA
4. Department of Epidemiology and Preventive Medicine, University of California, Davis, California 95616, USA