1. Faculty of Medicine Department of Chest Diseases Assiut University Assiut Egypt
2. Faculty of Medicine Department of Gastroenterology and Tropical Medicine Assiut University Assiut Egypt
3. Faculty of Science Department of Botany and Microbiology Assiut University Assiut Egypt
4. Faculty of Science Department of Medical Microbiology Ibb University Ibb Yemen
5. Department of Pathology Assiut University Assiut Egypt