Avian influenza can be transmitted directly from duck to human across species barrier

Lead: it is reported that influenza virus can cross species barrier and pass directly from duck to human Recently, the joint influenza research center of Shantou University School of medicine and Hong Kong University School of medicine announced to reporters the recent progress in the field of virology research They believe that there is an urgent need to strengthen the monitoring of animal viruses The 423 volume column of nature, an international authoritative academic journal published on December 12, introduces the research progress The old view of PKB: avian influenza is mostly transmitted from pig to human According to the introduction, there were four times of worldwide influenza in the 20th century Domestic animals, especially birds, are considered to be the source of influenza outbreak Birds carry a large group of influenza viruses, and the genes of these influenza viruses can be transmitted from animals to human with slight changes Previous gene analysis of influenza virus by PKB showed that pigs are the most likely animals as "gene mixing containers" Different avian influenza viruses can have gene recombination in pigs, thus producing virus strains that can infect humans PKB new discovery: PKB can be transmitted directly from duck to human by the joint influenza research center of Shantou University Medical College and Hong Kong University Medical College Through the analysis of a large number of poultry samples, it is found that H9N2 subtype avian influenza virus can be transmitted to each other in chickens and ducks, and multiple recombination occurs in ducks Analysis shows that the flu virus may not need pigs as a "gene mixing container" and directly pass from duck to human PKB because humans do not have immunity to them, therefore, these animal influenza viruses have high pathogenicity and can be spread in people The recent outbreak of PKB (which is suspected to be caused by the spread of virus from animals to humans) suggests that the monitoring of animal viruses should be strengthened (Guangzhou Daily, Wang chonghan, correspondent, Cai Shushen) PKB