Risk factors for infection with highly pathogenic influenza A virus (H5N I) in commercial chickens in Bangladesh

TY - JOUR

T1 - Risk factors for infection with highly pathogenic influenza A virus (H5N I) in commercial chickens in Bangladesh

AU - Biswas, P. K.

AU - Christensen, J. P.

AU - Ahmed, S. S.U.

AU - Barua, H.

AU - Das, A.

AU - Rahman, M. H.

AU - Giasuddin, M.

AU - Hannan, A. S.M.A.

AU - Habib, A. M.

AU - Debnath, N. C.

PY - 2009/6/13

Y1 - 2009/6/13

N2 - A matched case-control study was carried out to identify risk factors for highly pathogenic avian influenza A virus (subtype H5N I) infection in commercial chickens in Bangladesh. A total of 33 commercial farms diagnosed with H5N I before September 9, 2007, were enrolled as cases, and 99 geographically matched unaffected farms were enrolled as control farms. Farm data were collected using a pretested questionnaire, and analysed by matched-pair analysis and multivariate conditional logistic regression. Two factors independently and positively associated with H5N I infection remained in the final model. They were 'farm accessible to feral and wild animals' (odds ratio [OR] 5.71, 95 per cent confidence interval [Cl] 1.81 to 18.0, P=0.003) and 'footbath at entry to farm/shed' (OR 4.93, 95 per cent Cl 1.61 to 15.1, P=0005). The use of a designated vehicle for sending eggs to a vendor or market appeared to be a protective factor (OR 0.14, 95 per cent Cl 002 to 0.88, P=0.036).

AB - A matched case-control study was carried out to identify risk factors for highly pathogenic avian influenza A virus (subtype H5N I) infection in commercial chickens in Bangladesh. A total of 33 commercial farms diagnosed with H5N I before September 9, 2007, were enrolled as cases, and 99 geographically matched unaffected farms were enrolled as control farms. Farm data were collected using a pretested questionnaire, and analysed by matched-pair analysis and multivariate conditional logistic regression. Two factors independently and positively associated with H5N I infection remained in the final model. They were 'farm accessible to feral and wild animals' (odds ratio [OR] 5.71, 95 per cent confidence interval [Cl] 1.81 to 18.0, P=0.003) and 'footbath at entry to farm/shed' (OR 4.93, 95 per cent Cl 1.61 to 15.1, P=0005). The use of a designated vehicle for sending eggs to a vendor or market appeared to be a protective factor (OR 0.14, 95 per cent Cl 002 to 0.88, P=0.036).

UR - http://www.scopus.com/inward/record.url?scp=68149141762&partnerID=8YFLogxK

U2 - 10.1136/vr.164.24.743

DO - 10.1136/vr.164.24.743

M3 - Journal article

C2 - 19525522

AN - SCOPUS:68149141762

SN - 0042-4900

VL - 164

SP - 743

EP - 746

JO - Veterinary Record

JF - Veterinary Record

IS - 24

ER -