1. Laboratory of Immunoparasitology, Department of Immunology, Aggeu Magalhães Institute Oswaldo Cruz Foundation (FIOCRUZ) Recife Pernambuco Brazil
2. Laboratório de Ecologia e Doenças Transmissíveis na Amazônia, Leônidas e Maria Deane Institute Oswaldo Cruz Foundation (FIOCRUZ) Manaus Amazonas Brazil
3. Parasitology Unit, Department of Veterinary Medicine University of Bari Valenzano Italy