1. Department of Microbiology and Parasitology; Federal University of the State of Rio de Janeiro; Rio de Janeiro Brazil
2. Department of Anatomy and Histology; Federal University of the State of Rio de Janeiro; Rio de Janeiro Brazil
3. Post-graduate Programme in Neurology; Federal University of the State of Rio de Janeiro; Rio de Janeiro Brazil
4. Department of General Medicine; Federal University of the State of Rio de Janeiro; Rio de Janeiro Brazil
5. Department of Microbiology, Immunology and Parasitology; State University of Rio de Janeiro; Rio de Janeiro Brazil