1Division of Infection and Pathway Medicine, School of Biomedical Sciences, Edinburgh Medical School, College of Medicine and Veterinary Medicine, The University of Edinburgh, 1 George Square, Edinburgh EH8 9JZ, UK
2Livestock and Poultry Research Centre, University of Ghana, P.O. Box LG 25, Legon, Accra, Ghana
3Trypanosomiasis Department, Nigerian Institute for Trypanosomiasis Research, P. M. B. 1303, Vom, Plateau State, Nigeria
4Veterinary Clinic, National Veterinary Research Institute, P. M. B. 01, Vom, Plateau State, Nigeria