1. Laboratory of Research in Bacteriology
2. Faculdade de Medicina do TriÂngulo Mineiro, Uberaba, Brazil
3. Minas Gerais Institute of Gastrointestinal Procedures
4. Governador Israel Pinheiro Hospital, Belo Horizonte
5. Departments of Internal Medicine
6. Microbiology
7. Pathology, Universidade Federal de Minas Gerais