1. Federal Rural University of Amazon; Capitão-Poço Pará Brazil
2. Department of Biomedical Sciences; Ontario Veterinary College; University of Guelph; Guelph Ontario Canada
3. Federal Institute of Education; Science and Technology of Pará; Abaetetuba Pará Brazil
4. Laboratory of Parasitology; Institute of Biological Science; Federal University of Pará; Belém Pará Brazil
5. Laboratory of Neuroendocrinology; Institute of Biological Science; Federal University of Pará; Belém Pará Brazil
6. University of Northern Paraná; Londrina Paraná Brazil