Porcine reproductive and respiratory syndrome (PRRS) is one of the most economically important diseases affecting the swine industry. The main objective of this study was to assess whether sow farm distance to slaughterhouses and meteorological variables were associated with PRRS outbreaks. This case-control study paired 104 sow farms with or without a reported PRRS outbreak (N = 208) during the same period. Data on the distance to the closest slaughterhouse, swine density, presence of an air filtration system, or a neighboring farm, and weather conditions were collected, and a multivariable conditional logistic regression model was created to investigate the association between variables of interest and the occurrence of a PRRS outbreak. Swine densiry, presence of an air filtration system, presence of a neighboring farm, and PRRS herd-level status before the outbreak were associated with the occurrence of PRRS outbreaks. Farms in areas with higher swine density and nearby swine farms had increased odds of reporting an outbreak compared to farms in low swine density areas and farms having no neighbors. Under the conditions of this study, none of the meteorological variables or the distance to the closest slaughterhouse were associated with occurrence of PRRS outbreaks.
|Original language||English (US)|
|Number of pages||7|
|Journal||Canadian Veterinary Journal|
|State||Published - May 2022|
Bibliographical noteFunding Information:
Funding, wholly or in part, was provided by the National Pork Checkoff and the U.S. Pork Center of Excellence and the Swine Health Information Center. The authors acknowledge participants of the Morrison Swine Health Monitoring Project (MSHMP), Swine Health Information Center-funded project, for data sharing. Preliminary results were presented by the primary author (Moeller) as an oral presentation at the 2019 Allen D. Leman Conference, St. Paul, MN, 14-17 September, 2019, and as a poster presentation at the 51st American Association of Swine Veterinarians Annual Meeting, Atlanta, Georgia, USA, March 7-10, 2020.
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