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First Positive Detection of H9 Subtype of Avian Influenza Virus Nucleic Acid in Aerosol Samples from live poultry markets in Guangxi, South of China

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Chinese Medical Journal 2016年第11期129卷 1371-1373页

作者： Ning Kang Min Chen Fu-Yin Bi Min-Mei Chen Yi Tan Institute of Acute Infectious Diseases Control and Prevention Guangxi Zhuang Autonomous Region for Disease Prevention and Control Nanning Guangxi 530028 China

Avian influenza has become a serious public health problem. Risk factors for human cases are direct or closed contact with ill, died poultry and live poultry markets （LPMs） exposure.

关键词： Aerosol Avian Influenza Virus Guangxi live poultry markets

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Isolation of H5N6,H7N9 and H9N2 avian influenza A viruses from air sampled at live poultry markets in China,2014 and 2015

Isolation of H5N6,H7N9 and H9N2 avian influenza A viruses fr...

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2016新发传染病研究热点研讨会

作者： Jie Zhou Jie Wu Xianqiao Zeng School of Public Health Li Ka Shing Faculty of MedicineThe University of Hong Kong

Zoonotic infections by avian influenza viruses occur at the human–poultry interface,but the modes of transmission have not been fully investigated. We assessed the potential for airborne and fomite transmission at live poultry markets in Guangzhou city and in Hong Kong Special Administrative Region(SAR),China,during 2014 and 2015. Viral genome and infectious avian influenza A viruses of H5N6,H7N9,and H9N2 subtypes were detected predominantly from particles larger than 1 μm in diameter in the air sampled with cyclone-based bioaerosol samplers at the live poultry markets in Guangzhou. Influenza A(H9N2) viruses were ubiquitously isolated every month during the study period from air and environmental swabs,and different lineages of H9N2 virus were isolated from markets where chickens and minor land-based poultry were sold. The use of de-feathering devices increased the quantity of virus-laden airborne particles while market closure reduced the amount of such particles. The results highlight the possibility of airborne transmission of avian influenza viruses among poultry or from poultry to humans within such settings. This may explain epidemiological observations in which some patients with H7 N9 infection reported being in markets but no direct contact with live poultry or poultry stalls.

关键词： avian influenza virus modes of transmission air sampling live poultry markets

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Investigation on the Environmental Pollution Status of Avian Influenza Virus in live poultry Market in Guangdong Province during 2012-2015

Investigation on the Environmental Pollution Status of Avian...

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2016新发传染病研究热点研讨会

作者： ZOU Lirong MAO Xiaoxiao Wu Jie Centre for Disease Control and Prevention of Guangdong province

Investigation outer environment pollution for avian influenza virus from live poultry markets in Guangdong Province during 2012-2015 to discover potential human avian influenza incidence of risk factors and to provide scientific reference for prevention and treatment of human avian influenza virus. Use information management system data about Infectious disease monitoring platform and descriptive epidemiology,and analysis epidemiological features of various subtypes of virus from live poultry markets and investigate outer environment pollution for avian influenza virus from live poultry markets in Guangdong Province during 2012-2015. A total of 33079 environmental samples were collected and tested from 2012 to 2015 in twenty-one cities,and the overall positive rate of avian influenza A virus was 24.23%. the positive rate of highly pathogenic H5、H7 and H9 viruses was 3.70%、3.89% and 13.53% respectively. Apart from the positive rate with the seasonal increase in 2012,the peak of Flu A positive rate of emergence was in the spring and winter. Collecting different parts or site specimens,slaughter poultry chopping board surface was the highest positive rate(Flu A 39.49%,H5 8.41%,H7 7.41%,H9 23.84%),while feces specimens was the lowest positive rate(Flu A 14.99%,H5 1.73%,H7 2.38%,and H9 7.23%).Collecting specimens of related species,chicken(64.08%),duck(55.84%) and bird(51.92%),the positive rate of avian influenza virus is all above 50% and H5,H7 and H9 all can be checked out from related species. Also found that more regions distribution of H7 subtypes in the environment and the number of cases of corresponding regions H7 N9 human infection have significant correlation(r = 0.689,P live poultry markets of twenty-one cities

关键词： live poultry markets Pollution Study Epidemiological investigation

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