4Cavanagh D. Cornavviruses and Toroviruses[C]//In Zucker- man A Z, Banatvala J E, Pattison J R(eds). Principles and Practice of Clinical Virology, 4th ed. John Wiley and Sons: Chiehester, United Kingdom,2000:345-356.
6Jayaram J. Studies on the nucleocapsid protein of infectious bronchitis virus[D]. Texas Ab-M University,2013.
7Jahantigh M, Salari S, Hedayati M. Detection of infectious bronchitis virus serotypes by reverse transcription polymerase chain reaction in broiler chickens[J]. Springer Plus, 2013,2 (1), 1-4.
8Sumi V, Singh S D, Dhama K, et al. Isolation and molecular characterization of infectious bronchitis virus from recent out breaks in broiler flocks reveals emergence of novel strain in India[J]. Trop Anim Health Prod. 2012,44(7) : 1791-1795.
9Zhou Ying Shun, Zhang Yi, Wang Hong Ning, et al. Estab- lishment of reverse genetics system for infectious bronchitis virus attenuated vaccine strain H120 [J]. Vet Microbiol, 2013,162:51-63.