1. University of Ibadan, Ibadan, Nigeria
2. TB Diagnosis Section, Veterinary Laboratories Agency Weybridge, Woodham Lane, New Haw, Addlestone, Surrey KT15 3NB, United Kingdom
3. TB Research Group, Veterinary Laboratories Agency Weybridge, Woodham Lane, New Haw, Addlestone, Surrey KT15 3NB, United Kingdom