1. Rufa'a Teaching Hospital Rufa Sudan
2. General surgeon, Rufa'a Teaching Hospital Albutana University Rufa Sudan
3. Consultant Surgeon, Rufa'a Teaching Hospital Albutana University Rufa Sudan
4. Institute of Endemic diseases University of Khartoum Khartoum Sudan
5. Swiss Tropical and Public Health Institute (Swiss TPH) Allschwil Switzerland
6. University of Basel Basel Switzerland
7. ErasmusMC, University Medical Center Rotterdam Department of Medical Microbiology and Infectious Diseases Rotterdam the Netherlands
8. Faculty of Medical Laboratory sciences University of Khartoum Khartoum Sudan