1. Department of Community and Public Health, College of Health Professions, Campus Box 8090, Idaho State University, Pocatello, Idaho 83209.
2. Aquatic Parasitology Laboratory and Southeastern Cooperative Fish Parasite and Disease Project, School of Fisheries, Aquaculture, and Aquatic Sciences, College of Agriculture, Auburn University, 203 Swingle Hall, Auburn, Alabama 36849.