1. United Sates Department of Agriculture, Animal and Plant health Inspection Service, Wildlife Services, National Wildlife Research Center, Fort Collins, Colorado, U. S. A.
2. Faculté de Médecine Vétérinaire, Université de Montréal, Saint-hyacinthe, Québec, Canada
3. United States Department of Agriculture, Animal and Plant health Inspection Service, Wildlife Services, Auburn, Alabama, U. S. A.
4. United States Department of Agriculture, Animal and Plant health Inspection Service, Wildlife Services, National Rabies Management Program, Concord, New hampshire, U. S. A.