A case-control study to identify risk factors associated with avian influenza subtype H9N2 on commercial poultry farms in Pakistan.

ABSTRACT: A 1:1 matched case-control study was conducted to identify risk factors for avian influenza subtype H9N2 infection on commercial poultry farms in 16 districts of Punjab, and 1 administrative unit of Pakistan. One hundred and thirty-three laboratory confirmed positive case farms were matched on the date of sample submission with 133 negative control farms. The association between a series of farm-level characteristics and the presence or absence of H9N2 was assessed by univariable analysis. Characteristics associated with H9N2 risk that passed the initial screening were included in a multivariable conditional logistic regression model. Manual and automated approaches were used, which produced similar models. Key risk factors from all approaches included selling of eggs/birds directly to liv

SUBMITTER: Chaudhry M 

PROVIDER: S-EPMC4361405 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature