1. Laboratory of Fish Bacteriology (LABBEP), Department of Veterinary Preventive Medicine, State University of Londrina, Londrina 86057-970, Brazil
2. Department of Biological Sciences, Universidade Federal do Vale do São Francisco, Petrolina 56304-917, Brazil
3. Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte 31270-901, Brazil