1. Georgia Department of Natural Resources, Game and Fish Division, Sapelo Island, Georgia 31327, USA
2. Present address: School of Forest Resources, The University of Georgia, Athens, Georgia 30602, USA
3. Southeastern Cooperative Wildlife Disease Study, Department of Parasitology, College of Veterinary Medicine, The University of Georgia, Athens, Georgia 30602, USA
4. E.I. Du Pont De Nemours and Company, Incorporated, Sabine River Works, Post Office Box 1089, Orange, Texas 77631, USA