Use of National Pneumonia Surveillance to Describe Influenza A(H7N9) Virus Epidemiology, China, 2004-2013

被引:68
作者
Xiang, Nijuan [1 ]
Havers, Fiona [2 ]
Chen, Tao [1 ]
Song, Ying [3 ]
Tu, Wenxiao [1 ]
Li, Leilei [1 ]
Cao, Yang [1 ]
Liu, Bo [1 ]
Zhou, Lei [1 ]
Meng, Ling [1 ]
Hong, Zhiheng [1 ]
Wang, Rui [1 ]
Niu, Yan [1 ]
Yao, Jianyi [1 ]
Liao, Kaiju [1 ]
Jin, Lianmei [1 ]
Zhang, Yanping [1 ]
Li, Qun [1 ]
Widdowson, Marc-Alain [2 ]
Feng, Zijian [1 ]
机构
[1] Chinese Ctr Dis Control & Prevent, Beijing, Peoples R China
[2] Ctr Dis Control & Prevent, Atlanta, GA USA
[3] Ctr Dis Control & Prevent, Beijing, Peoples R China
关键词
A H7N9; HUMAN INFECTIONS; POULTRY;
D O I
10.3201/eid1911.130865
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
In mainland China, most avian influenza A(H7N9) cases in the spring of 2013 were reported through the pneumonia of unknown etiology (PUE) surveillance system. To understand the role of possible underreporting and surveillance bias in assessing the epidemiology of subtype H7N9 cases and the effect of live-poultry market closures, we examined all PUE cases reported from 2004 through May 3, 2013. Historically, the PUE system was underused, reporting was inconsistent, and PUE reporting was biased toward A(H7N9)-affected provinces, with sparse data from unaffected provinces; however, we found no evidence that the older ages of persons with A(H7N9) resulted from surveillance bias. The absolute number and the proportion of PUE cases confirmed to be A(H7N9) declined after live-poultry market closures (p<0.001), indicating that market closures might have positively affected outbreak control. In China, PUE surveillance needs to be improved.
引用
收藏
页码:1784 / 1790
页数:7
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