Detection of Avian H7N9 Influenza A Viruses in the Yangtze Delta Region of China During Early H7N9 Outbreaks

Li, Yin; Huang, Xinmei; Zhao, Dong; Liu, Yuzhuo; He, Kongwang; Yaoxing, Liu; Chen, Changhai; Liang, Liping; Xu, Yifei; Xie, Xinhua; Han, Kyung-Nam; Liu, Xiaoyan; Yang, Jing; Zhang, Youfa; Fěng, Fang; Webby, Richard J.; Wan, Xiu‐Feng

doi:10.1637/11098-042015-reg

Cited by 4 publications

(4 citation statements)

References 22 publications

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“…Despite significant efforts and resources dedicated to the control of these diseases, they remain a difficult challenge to face due to the increase in mobility between countries, and the difficulties of accessing treatment for some populations and for cases resistant to treatment [58,59].…”

Section: Discussionmentioning

confidence: 99%

Migrant Workers and Physical Health: An Umbrella Review

et al. 2019

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Migrants are mainly employed in “3D jobs” which are dirty, dangerous, and difficult, are characterized by monotony and intense rhythms, and are found in sectors with higher risks such as construction, heavy industry, and agriculture. The aim of this study is to construct a systematic review in order to identify the main occupational risks and occupational diseases of this category. Research included articles published from 2013 to 2018 on major online databases (PubMed, Cochrane Library, and Scopus), which were obtained using a combination of keywords (migrant workers, expatriates, physical health, diseases, illnesses, travel, travelers, work, and occupational medicine). The online search included 1109 references. We excluded 977 studies because they were unrelated to physical health and another 64 due to duplication. There were 68 articles which were analyzed, including six reviews and 62 original articles. The main risks which emerged are developing infectious diseases, metabolic cardiovascular diseases and manifesting a lower quality of life, in particular due to difficulties in accessing local health services. It will be crucial to implement the role of occupational medicine in order to introduce multilevel interventions designed to prevent work-related injuries and illnesses, and to promote healthier working environments.

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Section: Discussionmentioning

confidence: 99%

Migrant Workers and Physical Health: An Umbrella Review

et al. 2019

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“…While H7N9 is largely asymptomatic in poultry, it has resulted in more human deaths than H5 AIVs (Shi et al, 2017;Xiang et al, 2018) Li et al, 2016;Zeng et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, unlike for H5N1 and related viruses, the 2013 H7N9 AIVs is still restricted to China (FAO, 2019). The current level of vaccine coverage for H7N9 among chickens may be very high, and low H7N9 prevalence in pigeons, ducks and geese indicate that mass vaccination of the susceptible population may even eliminate or severely restrict the transmission of the virus (Jiang et al., 2019; Li et al., 2016; Zeng et al., 2018).…”

Section: Discussionmentioning

confidence: 99%

A mixed methods study of stakeholders’ practices and attitudes on avian influenza H7N9 vaccination for the yellow broiler industry in Guangxi, China

Tang

Shen

Zou

et al. 2021

Transbounding Emerging Dis

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In response to a sudden increase in H7N9 human infections, China introduced an H5/H7 bivalent inactivated vaccine for poultry in Guangxi and Guangdong provinces in July 2017, which subsequently became integrated into the existing compulsory national H5N1 vaccination programme from September 2017. Although the vaccination programme effectively reduced H7N9 infections in humans and poultry, there are ongoing arguments against continuing this long-term vaccination. These discussions have drawn policymakers to think about the possibility of stopping routine vaccination for H7N9 avian influenza viruses (AIVs) in China; however, they have not considered the poultry industry stakeholders' practices on and attitudes towards this vaccination. This study investigated H7N9 vaccination practices in the yellow broiler industry in Guangxi and stakeholders' attitudes on H7N9 vaccination, using a mixed methods design. The study found H7N9 vaccination was well adopted in the yellow broiler industry in Guangxi regardless of the source of the vaccines. Most stakeholders believed vaccination was the best measure to control H7N9 and H5N1 AIVs, and they showed a strong willingness to continue with vaccination even without government subsidies or freely provided vaccines. The motivations by stakeholders for using vaccines to control H7N9 and H5N1 were different due to the epidemiological differences between the two strains. Understanding poultry industry stakeholders' practices and attitudes on H7N9 vaccination has important practical implications in planning vaccination policies, particularly when considering the possibility of vaccination withdrawal.

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“…Also, 6,740 environmental samples collected and tested from LPMs in Zhejiang showed that 10.09% (680/6740) of the samples were H7N9-positive [16]. In April of 2013, 15 H7N9 viruses were isolated from 422 oral-pharyngeal and cloacal swabs collected from birds and environmental surfaces at five LPMs in Jiangsu [17]. In 2014, 6% (16/283; 4 chickens, 7 ducks, 1 goose, and 4 pigeons) of tracheal, cloacal, and fecal samples, collected from a variety of birds in poultry markets and farms in Jiangsu province, were positive for H7N9 viruses[18].…”

Section: Introductionmentioning

confidence: 99%

H7N9 avian influenza A virus in China: a short report on its circulation, drug resistant mutants and novel antiviral drugs

Bao

Liu

et al. 2017

Expert Review of Anti-infective Therapy

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Introduction: The first human H7N9 avian influenza virus case was reported in Shanghai in 2013. Shortly thereafter, this virus spread to other regions in China. Molecular analysis indicated that the H7N9 virus is a reassortant virus containing internal genes from the H9N2 virus and previously described mammalian adaption markers, which could allow the virus to adapt efficiently to a mammalian host. Fortunately, there is no evidence of sustained person-to-person spread. Most of the human H7N9 cases have a history of exposure to live poultry markets (LPMs). The circulating H7N9 were low pathogenic viruses, however highly pathogenic H7N9 viruses were recently identified in human cases. Areas covered: In the present article, the circulation of H7N9 in LPMs of China, the five waves of H7N9 infection in humans, recently identified drug resistant mutants and potential antiviral drugs against H7N9 are discussed; this may provide further understanding of the evolution and pandemic potential of the H7N9 influenza viruses. Expert commentary: All the data reveal that the major source of H7N9 viruses is LPMs and the H7N9 virus is still circulating widely in China. It is concerning that the recent emergence of highly pathogenic H7N9 viruses may result in highly transmissible viruses in mammalian species.

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Detection of Avian H7N9 Influenza A Viruses in the Yangtze Delta Region of China During Early H7N9 Outbreaks

Cited by 4 publications

References 22 publications

Migrant Workers and Physical Health: An Umbrella Review

Migrant Workers and Physical Health: An Umbrella Review

A mixed methods study of stakeholders’ practices and attitudes on avian influenza H7N9 vaccination for the yellow broiler industry in Guangxi, China

H7N9 avian influenza A virus in China: a short report on its circulation, drug resistant mutants and novel antiviral drugs

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