1. Department of Medical Microbiology and Infectious Diseases, ErasmusMC, University Medical Center Rotterdam , Rotterdam, The Netherlands
2. Faculty of Medical Laboratory Sciences, University of Khartoum , Khartoum, Sudan
3. Institute of Endemic diseases, University of Khartoum , Khartoum, Sudan
4. Swiss Tropical and Public Health Institute (Swiss TPH) , Allschwil, Switzerland
5. Faculty of Science, University of Basel , Petersplatz 1 , Switzerland