Research Article
Possible Causes of Re-Emerging outbreaks of H5N1 Avian Influenza Virus in Vaccinated Chickens in Sharkia Governorate in Egypt
Department of Virology, Faculty of Veterinary Medicine,Cairo University, Giza 12211 Egypt
H.A. Sultan
Department of Diseases of Poultry, Faculty of Veterinary Medicine, Menoufia University, Egypt
A.H. EL-Deeb
Department of Virology, Faculty of Veterinary Medicine,Cairo University, Giza 12211 Egypt
A.A. El-Sanousi
Department of Virology, Faculty of Veterinary Medicine,Cairo University, Giza 12211 Egypt