1. Departamento de Patologia Faculdade de Medicina Universidade Federal Fluminense Rio de Janeiro Brasil
2. Health Sciences Center Institute of Microbiology Paulo de GóesFederal University of Rio de Janeiro Rio de Janeiro Brazil
3. Laboratory of Diphtheria and Corynebacteria of Clinical Relevance The Collaborating Centre for Reference and Research on Diphtheria/National Health Foundation/Ministry of Health College of Medical Sciences University of the State of Rio de Janeiro Rio de Janeiro Brasil
4. Environmental Science and Conservation Department College of Medicine Federal University of Rio de Janeiro Macaé Brazil
5. Department of Statistics Institute of Mathematics and Statistics Fluminense Federal University Niterói Brazil
6. Microbiology, Immunology and Parasitology Department College of Medical Sciences University of the State of Rio de Janeiro Rio de Janeiro Brazil
7. Pathology and Veterinary Clinic Departament College of Veterinary Medicine Fluminense Federal University Niterói Brazil