1. Department of Comparative Zoology Institute of Evolution and Ecology, University of Tübingen Tübingen Germany
2. Faculty of Science, Department of Cellular and Molecular Parasitology University of Buea Buea Cameroon
3. Programme Onchocercoses field station University of Tübingen Ngaoundéré Cameroon
4. Faculty of Agriculture and Veterinary Medicine, Department Veterinary Medicine University of Buea Buea Cameroon
5. Faculty of Health Sciences University of Bamenda Bambili Cameroon
6. Laboratoire de Biologie Générale Université de Yaoundé I Yaoundé Cameroon