Tuesday, April 9, 2013

Experts: H7N9 virus from birds to "jump" to the more contagious than H5N1



Canada homes iask.ca 2013-04-09 07:4

Virus, deputy director of Chinese Center for Disease Control, National Influenza Center director Shu Yuelong, said yesterday that the H7N9 virus will continue to variation, whether it will continue to develop in the human body, should be closely monitored in the future. H7N9 avian virus is still, "My understanding is that this virus from birds to" jump "to the process, overall, this virus should be easier than the H5N1 infected people." Shu Yuelong said.
Shu Yuelong, H5N1 is a highly pathogenic virus, and H7N9 low pathogenic virus to humans, but instead to bring greater prevention and control pressure. H5N1 in poultry in a higher incidence of the more easily found, and H7N9 concealment, the difficulty of monitoring and prevention and control.
Shu Yuelong said, according to the current situation, the various parts of the people infected with the virus of the H7N9 avian flu patients who, little change between strains, has not yet found the variation. So far, the virus is still avian-borneiask.ca
Shu Yuelong, said yesterday that the shell of the H7N9 avian flu virus H7N9, but the interior is H9N2, belonging to an avian influenza virus, the variation of combinations of two or three of the avian influenza virus.
WHO proposed experts to China
He also stressed that the birds have a similar virus or highly homologous virus is very common, and is constantly changing. As to which direction to change, no one can guess. Pay close attention to the variability of the virus, is the focus of the prevention and control of the next step. Premed
WHO said, is premature at this stage to judge H7N9 fatality rate. In addition, the WHO is to send international experts to discuss and the mainland to China to assist in the investigation of a new avian influenza virus strain.
Financial new network quoted researcher at the Chinese Academy of Sciences, said that the H7N9 virus may produce the Yangtze River Delta the livestock and Korean wild bird virus gene reassortment.
Expert: virus from China and South Korea birds
Key Laboratory of Microbiology and Immunology, researchers of the Chinese Academy of Sciences pathogenic financial new reporter yesterday, said the virus fragment reassortant results show the eight gene segments of the H7N9 virus, H7 fragment from the avian influenza virus isolated in Zhejiang ducks, virus in Zhejiang ducks up retrospective, homologous to the avian influenza virus isolated Korean wild birds; homology of the avian influenza virus isolated N9 fragment of wild birds in Korea. The remaining six gene fragments derived from the H9N2 avian virus.
According to the viral genome comparison and phylogenetic analysis, H9N2 avian influenza virus from a flock of Shanghai, Zhejiang, Jiangsu and other places. Gene reassortment likely occurred in the Yangtze River Delta region. Process possibly via Korea of wild birds in the natural migration process, the ducks and the Yangtze River Delta region, flocks itself with the avian flu virus gene reassortment produce. 56.ca, Canada homes
Direct contact with birds or cases before infection
Taiwan Medical Association of the Infectious Diseases director, National Taiwan University, Department of Infectious Diseases Physician unusual feature, poultry immunization is not really a variety of avian influenza virus in poultry body for a long time, genetic recombination, and rare, violation of human ability has nothing to do with the virus, "the real virus the key that unlocks the human cell membrane H (hemagglutinin), either H7 or H9 does not have this ability, the only direct contact with birds or close contact with confirmed cases, and due to a large number of virus exposure and infection.

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