Case-control study of risk factors for human infection with influenza A(H7N9) virus in Jiangsu Province, China, 2013

J Ai; Y Huang; K Xu; D Ren; X Qi; H Ji; A Ge; Q Dai; J Li; C Bao; F Tang; G Shi; T Shen; Y Zhu; M Zhou; H Wang

doi:10.2807/1560-7917.ES2013.18.26.20510

Rapid communications Open Access

Like 0

Download

Case-control study of risk factors for human infection with influenza A(H7N9) virus in Jiangsu Province, China, 2013

J Ai¹, Y Huang^2,3, K Xu¹, D Ren^3,4, X Qi¹, H Ji¹, A Ge¹, Q Dai¹, J Li¹, C Bao¹, F Tang¹, G Shi³, T Shen³, Y Zhu¹, M Zhou¹, H Wang¹
View Affiliations Hide Affiliations

Affiliations: ¹ Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, Jiangsu, China ² Tongling Center for Disease Control and Prevention, Tongling, Anhui, China ³ Chinese Field Epidemiology Training Program, Chinese Center for Disease Control and Prevention, Beijing, China ⁴ Tongren Center for Disease Control and Prevention, Tongren, Guizhou, China

Correspondence:
Y Zhu
jszyf jscdc.cn
View Citation Hide Citation

Citation style for this article: Ai J, Huang Y, Xu K, Ren D, Qi X, Ji H, Ge A, Dai Q, Li J , Bao C, Tang F, Shi G, Shen T, Zhu Y, Zhou M, Wang H. Case-control study of risk factors for human infection with influenza A(H7N9) virus in Jiangsu Province, China, 2013. Euro Surveill. 2013;18(26):pii=20510. https://doi.org/10.2807/1560-7917.ES2013.18.26.20510 Received: 01 Jun 2013

Abstract

We describe a case-control study performed in Jiangsu, China, to evaluate risk factors for human infection with novel avian influenza A(H7N9) virus. Twenty-five cases and 93 controls matched by age, sex, and location were included in the study. Direct contact with poultry or birds in the two weeks before illness onset, chronic medical conditions (hypertension excluded), and environment-related exposures were significantly associated with A(H7N9) infection.