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Risk Factors for Influenza A(H7N9) Disease— China, 2013

Liu, Bo ; Havers, Fiona ; Chen, Enfu ; Yuan, Zhengan ; Yuan, Hui ; Ou, Jianming ; Shang, Mei ; Kang, Kai ; Liao, Kaiju ; Liu, Fuqiang ; Li, Dan ; Ding, Hua ; Zhou, Lei ; Zhu, Weiping ; Ding, Fan ; Zhang, Peng ; Wang, Xiaoye ; Yao, Jianyi ; Xiang, Nijuan ; Zhou, Suizan ; Liu, Xiaoqin ; Song, Ying ; Su, Hualin ; Wang, Rui ; Cai, Jian ; Cao, Yang ; Wang, Xianjun ; Bai, Tian ; Wang, Jianjun ; Feng, Zijian ; Zhang, Yanping ; Widdowson, Marc-Alain ; Li, Qun

Clinical infectious diseases, 2014-09, Vol.59 (6), p.787-794 [Periódico revisado por pares]

Oxford: OXFORD UNIVERSITY PRESS

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Título:
Risk Factors for Influenza A(H7N9) Disease— China, 2013
Autor: Liu, Bo ; Havers, Fiona ; Chen, Enfu ; Yuan, Zhengan ; Yuan, Hui ; Ou, Jianming ; Shang, Mei ; Kang, Kai ; Liao, Kaiju ; Liu, Fuqiang ; Li, Dan ; Ding, Hua ; Zhou, Lei ; Zhu, Weiping ; Ding, Fan ; Zhang, Peng ; Wang, Xiaoye ; Yao, Jianyi ; Xiang, Nijuan ; Zhou, Suizan ; Liu, Xiaoqin ; Song, Ying ; Su, Hualin ; Wang, Rui ; Cai, Jian ; Cao, Yang ; Wang, Xianjun ; Bai, Tian ; Wang, Jianjun ; Feng, Zijian ; Zhang, Yanping ; Widdowson, Marc-Alain ; Li, Qun
Assuntos: Adolescent ; Adult ; Aged ; Aged, 80 and over ; ARTICLES AND COMMENTARIES ; Avian flu ; Biological and medical sciences ; Case-Control Studies ; Child ; China - epidemiology ; Chronic obstructive pulmonary disease ; Disease risk ; Epidemiology ; Female ; Financial risk ; Health Behavior ; History, 21st Century ; Human viral diseases ; Humans ; Infections ; Infectious diseases ; Influenza A virus ; Influenza A Virus, H7N9 Subtype - genetics ; Influenza A Virus, H7N9 Subtype - immunology ; Influenza, Human - epidemiology ; Influenza, Human - history ; Male ; Medical sciences ; Middle Aged ; Obesity ; Poultry ; Predisposing factors ; Preventive medicine ; Public Health Surveillance ; Regression analysis ; Risk Factors ; Seroepidemiologic Studies ; Viral diseases ; Viral diseases of the respiratory system and ent viral diseases ; Viruses ; Young Adult
É parte de: Clinical infectious diseases, 2014-09, Vol.59 (6), p.787-794
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Descrição: Background. The majority of human cases of novel avian influenza A(H7N9), which emerged in China in spring 2013, include reported exposure to poultry. However, specific host and exposure risk factors for disease are unknown, yet critical to design prevention measures. Methods. In April–June 2013, we conducted a case-control study in 8 Chinese provinces. Patients with laboratory-confirmed A(H7N9) (n = 89) were matched by age, sex, and neighborhood to controls (n = 339). Subjects completed a questionnaire on medical history and potential exposures, including poultry markets and other poultry exposure. We used conditional logistic regression to calculate matched and adjusted odds ratios (ORs) for the association of A(H7N9) virus infection with potential risk factors. Results. Fifty-five percent of patients compared with 31% of controls reported any contact with poultry (matched OR [mOR], 7.8; 95% confidence interval [CI], 3.3–18.8). Sixty-seven percent of patients compared with 35% of controls visited a live poultry market (mOR, 5.4; CI, 3.0–9.7). Visiting live poultry markets increased risk of infection even after adjusting for poultry contact and other confounders (adjusted OR, 3.4; CI, 1.8–6.7). Backyard poultry were not associated with increased risk; 14% of cases did not report any poultry exposure or market visit. Obesity (mOR, 4.7; CI, 1.8–12.4), chronic obstructive pulmonary disease (mOR, 2.7; CI, 1.1–6.9), and immunosuppressive medications (mOR, 9.0; CI, 1.7–47.2) were associated with A(H7N9) disease. Conclusion. Exposures to poultry in markets were associated with A(H7N9) virus infection, even without poultry contact. China should consider permanently closing live poultry markets or aggressively pursuing control measures to prevent spread of this emerging pathogen.
Editor: Oxford: OXFORD UNIVERSITY PRESS
Idioma: Inglês

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Risk Factors for Influenza A(H7N9) Disease— China, 2013

Oxford: OXFORD UNIVERSITY PRESS

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