1. Department of Microbiology, Faculty of Veterinary Medicine, Cairo University, Egypt
2. (K.M. Osman)
3. Department of Biology, Faculty of Science, Taif University, Kingdom of Saudi Arabia
4. (N.A.Ezzeldeen)
5. Chlamydia Research Unit, Animal Health Research Institute, Egypt
6. (H.A. Ali)
7. (E.R. Mostafa)