1. Laboratory of Molecular Biology and Physiology of Streptococci; Institute of Biology Roberto Alcantara Gomes; Rio de Janeiro State University; Rio de Janeiro Brazil
2. Institute of Microbiology Paulo de Góes; Rio de Janeiro Federal University; Rio de Janeiro Brazil
3. National Institute of Metrology, Quality and Technology; Rio de Janeiro Brazil
4. Faculty of Medical Sciences; Rio de Janeiro State University; Rio de Janeiro Brazil
5. Departament of Veterinary Medicine; Federal Rural University of Pernambuco; Pernambuco Brazil