A. S. Abdel-Razek

Hot Laboratories and waste Management Center. Atomic Energy Authority, Cairo 13759, Egypt

B. M. Refaat

Microbiology Department, Faculty of Science, Al Azhar University

E. H. Abdel-Shakour

Microbiology Department, Faculty of Science, Al Azhar University

R. Zaher

Military Medical Academy

M. K. Mohamed

Hot Laboratories and waste Management Center. Atomic Energy Authority, Cairo 13759, Egypt