1. Bacteriology Section of the Evandro Chagas Institute, Ministry of Health, Ananindeua, Brasil.
2. Postgraduate Program in Epidemiology and Health Surveillance of the Evandro Chagas Institute, Ananindeua, Brasil.
3. Postgraduate Program in Parasitic Biology in the Amazon, State University of Pará, Belém, Brasil.
4. Department of Microbiology and Parasitology, Fluminense Federal University, Niterói, Brasil.