1. Division of Laboratories for Epidemiology and Control of Diseases, Laboratório Central do Estado do Parana-Lacen/PR, Curitiba, PR, Brazil
2. Department of Medicine, Universidade Positivo, Curitiba, PR, Brazil
3. Department of Microbiology, Fundação Ezequiel Dias, Belo Horizonte, MG, Brazil
4. Department of Occupational Epidemiologic, Environmental and Health Surveillance, State Secretariat of Health of Minas Gerais, Belo Horizonte, MG, Brazil
5. Laboratório de Toxina de Alimentos, Fundação Ezequiel Dias, Belo Horizonte, MG, Brazil