Immune Status to H5N1 Avian Influenza Virus of Bar-headed Geese on Bird Island in Qinghai Lake
青海湖鸟岛斑头雁种群对H5N1亚型禽流感病毒的免疫状况

The most infected species of H5N1 highly pathogenic avian influenza(HPAI)broke out in Qinghai Lake in 2005 was bar-headed goose (Anser indicus). To investigate the immune status to H5N1-AIV of bar-headed geese in Qinghai Lake National Nature Reserve, 68 ejected eggs and 125 in-nest eggs of the breeding colony were collected in spring 2008, and haemagglutination inhibition (HI) was applied to analyze their yolk MAb (IgY) to H5N1-AIV. The results revealed, three years after the outbreak of HPAI in 2005, 26.5%...