Measurement of culturable airborne staphylococci downwind from a naturally ventilated broiler house |
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Authors: | J Schulz L Formosa J Seedorf J Hartung |
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Institution: | 1.Institute for Animal Hygiene, Animal Welfare and Farm Animal Behaviour,University of Veterinary Medicine Hannover,Hannover,Germany;2.Department of Environment,Climate Change and Water,Sydney,Australia;3.University of Applied Sciences,Osnabrück,Germany |
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Abstract: | The objective of this study was to estimate the possible travel distance of airborne bacteria emitted from a naturally ventilated
broiler house by using staphylococci as indicator organisms. Air samples were taken during the second half of three fattening
periods with Impinger (AGI-30) in the barn and simultaneously upwind and downwind from the building. Staphylococci concentrations
varied between 1 × 106 and 1 × 107 cfu m−3 in the barn. No Staphylococci were detected in air samples at the upwind side. A strong exponential decrease of these bacteria
was observed at three sampling heights (1.5, 4.0 and 9.5 m) in the main wind direction downwind of the barn. Staphylococci
concentrations up to 5.9 × 103 cfu m−3 were detected at the farthest sampling point (333 m) downwind. Identification to the species level by means of a 16S–23S
ITS PCR confirmed that Staphylococcus spp. from downwind samples originated from the barn. Staphylococci served as an useful indicator to demonstrate the travel
distance of bacterial emissions originating from a naturally ventilated broiler house. These findings indicate that airborne
transmission of viable bacteria from this type of housing system to adjacent residential dwellings or animal houses several
hundred metres away is possible. |
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