6Senne D A, Panigrahy B, Kawaoka Y et al. Survey of the hemagglutinin(HA) cleavage site sequence of H5 and H7 avian influenza viruses : amino acid sequence at the HA cleavage site as a marker of pathogenicity potential [J]. Avian Dis, 1996 ,40(2) :525-437.
7Vogel G. Sequence offers clues to deadly flu [J]. Science, 1998,279:324.
8Seo S H, Hoffmann E, Wester R G. Lethal H5N1 influenza viruses escape host anti-viral cytokinc responses [J]. Nat Med, 2002,8(9) :950-954.
9Starick E, Romer-Oberdoffer A, Werner O. Type- and subtype-specific RT-PCR assays for avian influenza A viruses(AIV) [J]. J Vet Med B Infect Dis Vet Public Health, 2000,47(4) :295-301.
10Wang X, Castro A E, Castro M D et al. Production and evaluation criteria of specific monoclonal antibodies to the hemagglutinin of the H7N2 subtype of avian influenza virus [J]. J Vet Diagn Invest,2000,12(6) :503-509.
