1. Brazilian Field Epidemiology Training Program, Secretariat of Health Surveillance, Ministry of Health, Brasilia
2. Secretariat of Health Surveillance, Ministry of Health, Brasilia, DF
3. Foodborne and Waterborne Diseases Branch
4. Laboratory Coordination Branch
5. Secretariat of Health Minas Gerais State, Brazil
6. Centers for Disease Control and Prevention, Atlanta, GA, USA