Epidemiological link between exposure to poultry and all influenza A(H7N9) confirmed cases in Huzhou city, China, March to May 2013

J Han; M Jin; P Zhang; J Liu; L Wang; D Wen; X Wu; G Liu; Y Zou; X Lv; X Dong; B Shao; S Gu; D Zhou; Q Leng; C Zhang; K Lan

doi:10.2807/ese.18.20.20481-en

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Epidemiological link between exposure to poultry and all influenza A(H7N9) confirmed cases in Huzhou city, China, March to May 2013
J Han^1,2 , M Jin^1,2 , P Zhang^1,2 , J Liu^2,3 , L Wang^2,3 , D Wen¹ , X Wu¹ , G Liu¹ , Y Zou⁴ , X Lv⁵ , X Dong⁶ , B Shao⁷ , S Gu⁸ , D Zhou³ , Q Leng³ , C Zhang³ , K Lan³
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Affiliations: ¹ Huzhou Center for Disease Control and Prevention, Huzhou, Zhejiang China ² These authors contributed equally to this work ³ Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, China ⁴ Nanxun District Center for Disease Control and Prevention, Huzhou, Zhejiang, China ⁵ Wuxing District Center for Disease Control and Prevention, Huzhou, Zhejiang, China ⁶ Deqing County Center for Disease Control and Prevention, Huzhou, Zhejiang, China ⁷ Changxing County Center for Disease Control and Prevention, Huzhou, Zhejiang, China ⁸ Anji County Center for Disease Control and Prevention, Huzhou, Zhejiang, China

Correspondence:
C Zhang
zhangcy1999 ips.ac.cn
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Citation style for this article: Han J, Jin M, Zhang P, Liu J, Wang L, Wen D, Wu X, Liu G, Zou Y, Lv X, Dong X, Shao B, Gu S, Zhou D, Leng Q, Zhang C, Lan K. Epidemiological link between exposure to poultry and all influenza A(H7N9) confirmed cases in Huzhou city, China, March to May 2013. Euro Surveill. 2013;18(20):pii=20481. https://doi.org/10.2807/ese.18.20.20481-en Received: 05 May 2013

Abstract

We analysed the association between influenza A(H7N9) confirmed cases and exposure to poultry in Huzhou city, China. All cases (n=12) had a history of direct exposure to poultry or live poultry markets. We detected A(H7N9)-positive poultry samples from each site that was epidemiologically associated with cases. None of the cases' close contacts tested positive. After closure of the markets, no new cases were identified, suggesting an epidemiological link between poultry exposure and A(H7N9) virus infection. .