1. Food and Drug Administration, Center for Veterinary Medicine, Office of Research, Laurel, Maryland, USA.
2. Thad Cochran National Warmwater Aquaculture Center, College of Veterinary Medicine, Mississippi State University, Stoneville, Mississippi, USA.
3. Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, Louisiana, USA.
4. Department of Animal Sciences and Aquatic Ecology, Laboratory of Aquaculture and Artemia Reference Center, Ghent University, Ghent, Belgium.
5. Department of Pathology, Bacteriology, and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.