1. Departments of Medical Microbiology and Genitourinary Medicine1 and
2. Armed Forces Institute of Pathology, Rawalpindi, Pakistan2;
3. Centre for Microbiology Research, Kenya Medical Research Institute, Nairobi, Kenya3; and
4. Dhaka Medical College, Dhaka, Bangladesh4
5. School of Tropical Medicine,5 University of Liverpool, Liverpool L69 3GA, United Kingdom;