Department of Microbiology, Chittagong Veterinary and Animal Sciences University, Khulshi, Chittagong, Bangladesh.
Emerg Infect Dis. 2009 Dec;15(12):1931-6. doi: 10.3201/eid1512.090643.
To evaluate risk factors for infection with highly pathogenic avian influenza A virus (H5N1) in backyard chickens in Bangladesh, we conducted a matched case-control study. We enrolled 25 case farms (cases March-November 2007) and 75 control farms (June-November 2007). We used a questionnaire to collect farm data, which were analyzed by matched-pair analysis and multivariate conditional logistic regression. Factors independently associated were offering slaughter remnants of purchased chickens to backyard chickens (odds ratio [OR] 13.29, 95% confidence interval [CI] 1.34-131.98, p = 0.027), having a nearby water body (OR 5.27, 95% CI 1.24-22.34, p = 0.024), and having contact with pigeons (OR 4.47, 95% CI 1.14-17.50, p = 0.032). Separating chickens and ducks at night was protective (OR 0.06, 95% CI 0.01-0.45, p = 0.006). Reducing these risks and taking protective measures might reduce the risk for influenza (H5N1) infection in backyard chickens.
为了评估孟加拉国后院鸡感染高致病性禽流感 A 病毒（H5N1）的风险因素，我们进行了一项匹配病例对照研究。我们招募了 25 个病例农场（2007 年 3 月至 11 月）和 75 个对照农场（2007 年 6 月至 11 月）。我们使用问卷收集农场数据，并通过匹配对分析和多变量条件逻辑回归进行分析。独立相关的因素是向后院鸡提供购买鸡的屠宰残余物（比值比[OR] 13.29，95%置信区间[CI] 1.34-131.98，p = 0.027），附近有水体（OR 5.27，95% CI 1.24-22.34，p = 0.024），与鸽子接触（OR 4.47，95% CI 1.14-17.50，p = 0.032）。夜间将鸡和鸭分开是保护性的（OR 0.06，95% CI 0.01-0.45，p = 0.006）。降低这些风险并采取保护措施可能会降低后院鸡感染流感（H5N1）的风险。
