Affiliation: | 1. Department of Microbiology, Ahmadu Bello University, Zaria, Nigeria;2. CAPRISA, Doris Duke Medical Research Institute, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban, South Africa;3. Department of Biochemistry, Ahmadu Bello University, Zaria, Nigeria;4. Department of Gynaecology and Obstetrics, Ahmadu Bello University Teaching Hospital, Ahmadu Bello University, Zaria, Nigeria |