4Liu G, Zhang F, Shi J, et al. A subunit vaccine candi- date derived from a classic H5N1 avian influenza virus in China protects fowls and BALB/e mice from lethal challenge[J]. Vaccine, 2013,31 (46) .. 5398-5404.
5OIE. Manual of diagnostic tests and vaccines for ter- restrial animals[ M]. Paris: Office International des Epizooties, 2011.
6Reed L J, Muench H. A simple method of estimating fifty percent endpoints[J]. American Journal of Ep- idemiology, 1938,27 : 493-497.
7Swayne D,Suarez D L. Highly pathogenic avian influ- enza[J]. Revue Scienti fique ET Technique (Interna- tional Office of E pizootics ), 2000,19 (2) .. 463.
8辛朝安.禽病学[M].第2版.北京:中国农业出版社,2003.
9Perkins L E, Swayne D E. Pathobiology of A/Chick- en/Hong Kong/220/97 (H5N1) avian influenza virus in seven gallinaceous species[J]. Vet Pathol, 2001, 38(2): 149-164.
