Project Title: Dynamic Aerosol Toroid Chambers

Institution: Iowa State University

Outcome/Results: Developed equipment to study aerosol transmission under experimental conditions.

The primary routes of PRRSV transmission between farms are infected pigs and contaminated semen, but transmission of PRRSV has also been reported through contaminated needles, coveralls, boots, insects, and migratory waterfowl. Mechanical transmission of PRRSV can occur in warm and cold weather by contaminated transport vehicles and cargo.

Aerosol transmission within and between herds has been considered and aerosol transmission of PRRSV has been reported over short distances under experimental conditions. Aerosol transmission of PRRSV is known to occur, but the frequency of aerosol transmission within and between herds is unknown. Thus, the objective in the development of this equipment was to obtain the resources needed to determine the parameters of PRRSV aerosol transmission under experimental conditions at the individual pig level. Our long-term goal is to study aerosol transmission of PRRSV within and between farms. Ultimately, we will develop models capable of predicting the circumstances and distances of PRRSV aerosol transmission.