1. Department of Comparative Biomedical Sciences, College of Veterinary Medicine, Mississippi State University, 240 Wise Center Drive, Mississippi State, Mississippi 39762.
2. Mississippi Field Station, National Wildlife Research Center, Wildlife Services, U.S. Department of Agriculture, Mississippi State, Mississippi 39762.
3. Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, 240 Wise Center Drive, Mississippi State, Mississippi 39762.
4. Thad Cochran National Warmwater Aquaculture Center, Delta Research and Extension Center, Mississippi State University, Stoneville, Mississippi 38776.