1. Antimicrobial Research Unit and College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa.
2. Biomedical Resource Unit, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa.
3. Epidemiology Section, KwaZulu-Natal, Agriculture & Rural Development—Veterinary Service, Pietermaritzburg, South Africa.