1. Microbiology/Biological Sciences, Faculty of Sciences, Sana’a University, Yemen. Medical Laboratory Department, Faculty of Medical Sciences, Queen Arwa University, Yemen.
2. Medical Microbiology Department, Faculty of Applied Sciences, Hajjah University, Yemen. Medical Laboratory Department, Faculty of Medical Sciences, Al-Razi University, Yemen
3. Department of Medical laboratory technology - Al-Ma'afer Community College-Taiz Yemen
4. Department of Oral and Maxillofacial Surgery. Faculty of Dentistry, Sana’a University, Yemen. Dental Department, Faculty of Medical Sciences, Queen Arwa University, Yemen.
5. Medical Laboratory Department, Faculty of Medical Sciences, Queen Arwa University, Yemen.