TITLE

Risk Factors for Human Illness with Avian Influenza A (H5N1) Virus Infection in China

AUTHOR(S)
Lei Zhou; Qiaohong Liao; Libo Dong; Yang Huai; Tian Bai; Nijuan Xiang; Yuelong Shu; Wei Liu; Shiwen Wang; Pengzhe Qin; Min Wang; Xuesen Xing; Lv, Jun; Chen, Ray Y.; Zijian Feng; Weizhong Yang; Uyeki, Timothy M.; Hongjie Yu
PUB. DATE
June 2009
SOURCE
Journal of Infectious Diseases;6/15/2009, Vol. 199 Issue 12, p1726
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Background. In China, 30 human cases of avian influenza A (H5N1) virus infection were identified through July 2008. We conducted a retrospective case-control study to identify risk factors for influenza H5N1 disease in China. Methods. A questionnaire about potential influenza H5N1 exposures was administered to 28 patients with influenza H5N1 and to 134 randomly selected control subjects matched by age, sex, and location or to proxies. Conditional logistic regression analyses were performed. Results. Before their illness, patients living in urban areas had visited wet poultry markets, and patients living in rural areas had exposure to sick or dead backyard poultry. In multivariable analyses, independent risk factors for influenza H5N1 were direct contact with sick or dead poultry (odds ratio [OR], 506.6 [95% confidence interval {CI}, 15.7-16319.6]; P < .001), indirect exposure to sick or dead poultry (OR, 56.9 [95% CI, 4.3-745.6]; P = .002), and visiting a wet poultry market (OR, 15.4 [95% CI, 3.0-80.2]; P = .001). Conclusions. To prevent human influenza H5N1 in China, the level of education about avoiding direct or close exposures to sick or dead poultry should be increased, and interventions to prevent the spread of influenza H5N1 at live poultry markets should be implemented.
ACCESSION #
41534723

 

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