Federal Rural University of Rio de Janeiro. Institute of Veterinary Medicine. Department of Animal Parasitology. Multiuser Molecular Biology Laboratory. Serop?dica, RJ, Brazil.; Funda??o Oswaldo Cruz. Oswaldo Cruz Institute. Laboratory of Cellular Microbiology. Rio de Janeiro, RJ, Brazil.; Funda??o Oswaldo Cruz. Oswaldo Cruz Institute. Laboratory of Cellular Microbiology. Rio de Janeiro, RJ, Brazil.; Federal Ru...