Green Christopher F, Gibbs Shawn G, Tarwater Patrick M, Mota Linda C, Scarpino Pasquale V
Department of Civil and Environmental Engineering at the University of Cincinnati, Ohio, USA.
J Occup Environ Hyg. 2006 Jan;3(1):9-15. doi: 10.1080/15459620500430615.
The objective of this study was to evaluate the levels of bacteria in the air plume immediately upwind at 25 m and downwind at locations 25 m, 50 m, 100 m, and 150 m from a confined animal feeding operation (CAFO). It was hypothesized that this would give insight into determining the maximal distance that bacterial organisms release from a CAFO could travel, which would be important in determining the optimal siting distance for future CAFO in relation to high population areas. The Andersen two-stage sampler was used to collect all of the bacterial samples from the animal confinement facilities. The data show a marked increase in bacterial CFUs/m3 inside the facility (18,132 CFU/m3 average) versus upwind (63 CFU/m3 average) anda steady down wind decrease out to approximately 150 m. Staphylococcus aureus was found to account for 76% of the organisms recovered. We conclude that the optimal placement of a swine CAFO would be at least 200 m from a residential area.
本研究的目的是评估在距封闭式动物饲养场（CAFO）上风向25米处以及下风向25米、50米、100米和150米处的空气羽流中的细菌水平。据推测，这将有助于确定CAFO释放的细菌生物体能够传播的最大距离，这对于确定未来CAFO相对于高人口地区的最佳选址距离非常重要。使用安德森两级采样器从动物饲养设施中采集所有细菌样本。数据显示，设施内的细菌菌落形成单位/立方米（平均18,132 CFU/m³）与上风向（平均63 CFU/m³）相比显著增加，并且在下风向稳定下降至约150米处。发现金黄色葡萄球菌占回收生物体的76%。我们得出结论，猪CAFO的最佳选址应距离居民区至少200米。
