Influence of wind direction on the relationship between proximity to pig farms and risk of infection with MRSA CC398 among persons without known contact to livestock: a Danish nationwide population-based study.

ABSTRACT:

Background

Livestock-MRSA (methicillin-resistant Staphylococcus aureus) can cause infections in persons without known contact to livestock, but the route of transmission is unclear. We investigated whether the risk of livestock-MRSA infection among persons with no known contact to livestock is associated with the number of pig farms near the home, and whether this association is affected by the upwind/downwind location of the farms.

Methods

Register-based case-control study of 518 persons from Denmark with clinical infections with livestock-MRSA in 2016-2021 and no known exposure to livestock, and 4,944 matched controls. Distances and angles from home addresses to all pig farms within a distance of 25 km were calculated, and compared with the mean wind direction in the area.

SUBMITTER: Hansen MRH 

PROVIDER: S-EPMC12675557 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature