1. Calicivirus Research Laboratory, College of Veterinary Medicine, Oregon State University, Corvallis, Oregon 97331, USA
2. Present address: Department of Veterinary Microbiology, Immunology and Parasitology, New York State College of Veterinary Medicine, Cornell University, Ithaca, New York 14853, USA
3. Oregon Department of Fish and Wildlife, Marine Region, Marine Science Drive, Building 3, Newport, Oregon 97365, USA