1. Southeastern Cooperative Wildlife Disease Study, Department of Parasitology, College of Veterinary Medicine, The University of Georgia, Athens, Georgia 30602, USA
2. Department of Microbiology, Pathology and Parasitology, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina 27606, USA
3. Department of Pathology, College of Veterinary Medicine, The University of Georgia, Athens, Georgia 30602, USA