M. Ghiamirad1*, A. Pourbakhsh2, H. Keyvanfar, R. Momayaz2, S. Charkhkar1 and A. Ashtari2
1Department of Microbiology Sciences, Faculty of Specialized Veterinary Sciences, Islamic Azad University, Science and Research Branch, Tehran, Iran.
2Department of Poultry Diseases Research and Diagnosis, Razi Vaccine and Serum Research Institute Karaj, Iran.
