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KMID : 1094020150320010078
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Journal of Veterinary Clinics
2015 Volume.32 No. 1 p.78 ~ p.84
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An Epidemiological Study on Biosecurity Practices on Commercial Pig Farms in Korea: Risk Factors for Porcine Reproductive Respiratory Syndrome Virus Infection
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Kim Kyu-Wook
Pak Son-Il
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Abstract
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Although researches have highlighted the important role of enhanced farm biosecurity to reduce the severityand prevalence of diseases in livestock, to date there has been little study in Korea on farmers’ adoption of biosecuritymeasures to control porcine reproductive and respiratory syndrome virus (PRRSV) infection. To mitigate the risk ofPRRSV infection in pigs, the risk factors by which PRRSV is introduced in pig farms must be determined. The primaryaim of this study was to investigate pig producers’ perceptions about on-farm biosecurity practices. We also analyzeddata obtained from a cross-sectional study on 196 farrow-to-finish farms conducted between March 2013 and February2014 to identify risk factors for PRRSV infection at farm level. Standardized questionnaires with information aboutbasic demographical data and management practices were collected in each farm by on-site visit of trained veterinarians. Farms were classified as negative or positive through the use of infection profiles that combined data on PCR positivepigs and serological testing including antibody titer, sero-conversion pattern at each age category, and vaccination status. Data on biosecurity practices, farm management and environmental characteristics were analyzed using multivariateordinal logistic regression. Generally, the biosecurity level in the pig farms included in this study were insufficientto reduce/prevent the risk of PRRSV infection given the high pig density areas and the considerable extent of vehiclemovement. Factors associated with PRRSV infection were those where owners used on-farm vaccination programshad a lower risk of infection (OR = 0.19, 95% CI 0.06-0.61). The results from the analysis may guide to tailor biosecuritymeasures in the reduction or prevention of PRRS to the specific circumstances of pig farms in different localitiesof the world. To the best knowledge of the authors, this is the first study to report information on the biosecuritypractices currently implemented on Korean pig farms.
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KEYWORD
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biosecurity, pig farm, risk factor
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