Risk for Infection with Highly Pathogenic Avian Influenza Virus (H5N1) in Backyard Chickens, Bangladesh |
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| Authors: | Paritosh K. Biswas Jens P. Christensen Syed S.U. Ahmed Ashutosh Das Mohammad H. Rahman Himel Barua Mohammad Giasuddin Abu S.M.A. Hannan Mohammad A. Habib Nitish C. Debnath |
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| Affiliation: | Chittagong Veterinary and Animal Sciences University, Chittagong, Bangladesh (P.K. Biswas, S.S.U. Ahmed, A. Das, M.H. Rahman, H. Barua, N.C. Debnath);Copenhagen University, Copenhagen, Denmark (J.P. Christensen);Bangladesh Livestock Research Institute, Dhaka, Bangladesh (M. Giasuddin);Department of Livestock Services, Dhaka (A.S.M.A. Hannan, M.A. Habib) |
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| Abstract: | ![]()
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. |
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| Keywords: | Highly pathogenic avian influenza H5N1 backyard chickens risk factors influenza viruses research |
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