1. Zagazig University Hospitals, Infection Control Unit , Zagazig , 44519 , Egypt
2. Department of Microbiology and Immunology, Modern University for Technology & Information, Pharmacy College , Cairo , Egypt
3. Department of Botany and Microbiology, College of Science, King Saud University , Riyadh 11451 , Saudi Arabia
4. Department of Biochemistry, King Saud University, College of Science , Riyadh 11451 Saudi Arabia
5. Department of Biology, University of Dayton , Dayton , OH 45469 , USA
6. Chest Department, Zagazig University , 44519 , Zagazig , Egypt