1. University of Fortaleza, CE, Brazil
2. Department of Morphology, Faculty of Medicine, Federal University of Ceara, Fortaleza, CE, Brazil
3. Albert Sabin Children’s Hospital, Fortaleza, Ceara, Brazil
4. Laboratory of Bacteriology, Department of Pathology, Faculty of Medicine, Federal University of Ceara, Fortaleza, CE, Brazil
5. Facultad de Microbiología and Centro de Investigación en Enfermedades Tropicales, Universidad de Costa Rica, San José, Costa Rica
6. Federal University of Rio de Janeiro, Institute of Microbiology Paulo de Góes, Laboratory of Anaerobic Biology, Rio de Janeiro, Brazil