1. Department of Veterinary Parasitology and Entomology, Faculty of Veterinary Medicine, University of Ibadan, Nigeria 200284.
2. Centre for Control and Prevention of Zoonoses, University of Ibadan, Nigeria 200284.
3. These authors contributed equally to this work.
4. Cummings School of Veterinary Medicine at Tufts University, 200 Westboro Road, North Grafton, Massachusetts 01536.
5. Universidade Estadual Paulista (UNESP), Faculdade de Medicina Veterinária, Araçatuba, 16050-680 Brazil.
6. Department of Medical Microbiology and Parasitology, University College Hospital, Ibadan, Nigeria 200212.
7. Department of Paediatrics, University College Hospital, Ibadan, Nigeria, 200212.