1. Aquatic Parasitology Laboratory, School of Fisheries, Aquaculture, and Aquatic Sciences, College of Agriculture, Auburn University, 203 Swingle Hall, Auburn, Alabama 36849, U.S.A. (e-mail: )
2. Department of Biological Sciences and Molette Biology Laboratory for Environmental & Climate Change Studies, Auburn University, 101 Rouse Life Sciences Building, Auburn, Alabama 36830, U.S.A. (e-mail: )
3. Aquatic Microbiology Laboratory, School of Fisheries, Aquaculture, and Aquatic Sciences, Auburn University, 559 Duvall Drive, Auburn University, Auburn, Alabama 36832, U.S.A. (e-mail: )
4. Gulf Coast Research Laboratory, University of Southern Mississippi, 703 East Beach Drive, Ocean Springs, Mississippi 36849, U.S.A. (e-mail: )