1. Department of Medical Microbiology, School of Medicine, College of Medical Sciences, University of Benin, Benin City, Nigeria;
2. Department of Medical Microbiology, University of Benin Teaching Hospital, Benin City, Nigeria;
3. Department of Ophthalmology, University of Benin Teaching Hospital, Benin City, Nigeria;
4. Department of Ophthalmology, School of Medicine, College of Medical Sciences, University of Benin, Benin City, Nigeria