Outdoor Measurements Of Airborne Emission Of
Staphylococci From A Broiler Barn And Its
Predictability By Dispersion Models
Author(s)
J. Seedorf, J. Schulz & J. Hartung
Abstract
A field study was undertaken to determine the distance travelled by airborne
staphylococci from a commercial broiler barn and to evaluate qualitatively and
quantitatively the accuracy of predicted downwind concentrations 1.5m above
ground in the ambient air as revealed by a Gaussian plume and Langrangian
particle dispersion model. Field measurements showed that coagulase-negative
staphylococci emitted from the barn decreased exponentially on the downwind
side of the building. At least 4260 colony-forming units per m³ air were detected
in 477m distance. The airborne transmission of the staphylococci was chiefly
determined by the main wind direction, and this was in principle confirmed by
the dispersion models applied here. However, the accuracy of predictability was
unsatisfactory, and the values calculated by the two models were generally
contradictory.
Keywords: bioaerosol emission, staphylococci, broiler, airborne transmission,
dispersion models.
1 Introduction
Farm animal production is increasingly under public pressure because it is
responsible for the release of considerable amounts of solid, liquid and gaseous
emissions into the environment. Among the most important types of such aerial
pollutants are the so-called bioaerosols, which are also released by the
ventilation systems of livestock buildings. Bioaerosols in animal confinement
buildings consist of a complex mixture of organic dust (e.g. proteins,
polycarbohydrates), biologically active components (e.g. endotoxins, glucans)
Keywords
bioaerosol emission, staphylococci, broiler, airborne transmission,
dispersion models.
Related Book
Other papers in this volume
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