1. Mycetoma Research Centre, University of Khartoum, Khartoum, Sudan
2. Institute for Endemic Diseases, University of Khartoum, Khartoum, Sudan
3. Otolaryngology, Head and Neck Surgery Department, Soba University Hospital, University of Khartoum, Khartoum, Sudan
4. Faculty of Medical Laboratory Sciences, University of Khartoum, Khartoum, Sudan