Aerosols are essential indicators of indoor air quality in livestock houses. An investigation was conducted in a dairy calf house into the relationships between the concentration of aerosol number and the concentrations of the airborne aerobic bacteria, Staphylococcus aureus (S. aureus), Escherichia coli (E. coli), and Salmonella spp. examining their dependence on air temperature and relative humidity (RH). The aerosol number concentration and the concentrations of airborne aerobic bacteria, S. aureus, E. coli, and Salmonella spp. in the indoor air were monitored over 19 weeks, in Tochigi, Japan. A significant positive relationship was found between the concentration of airborne aerobic bacteria with aerosol sizes 0.3–5.0 μm and 0.5–1.0 μm and Salmonella spp. No relationship was found among the different sizes of aerosol concentration with airborne S. aureus or E. coli concentrations. The most significant positive relationships with temperature and RH were found with the 0.3–5.0 μm aerosol size range. Aerosol sizes 5.0–10.0 μm showed no associations with either air temperature or RH. Both airborne aerobic bacteria and S. aureus were strongly positively related to temperature. These findings will play a crucial role in elucidating the role of aerosols in the transmission of different types of airborne bacteria, and ultimately this could play an essential part in mitigating the influence of aerosols in the transmission of airborne bacteria in dairy houses.

中文翻译：

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温度和湿度对奶牛舍气溶胶数和空气中细菌动态的影响

气溶胶是畜舍室内空气质量的重要指标。在奶牛舍中对气溶胶数浓度与空气中需氧菌、金黄色葡萄球菌 (S. aureus)、大肠杆菌(E.coli) 和沙门氏菌浓度之间的关系进行了调查。检查它们对空气温度和相对湿度 (RH) 的依赖性。气溶胶数浓度和空气中需氧菌、金黄色葡萄球菌、大肠杆菌和沙门氏菌的浓度。在日本枥木市对室内空气中的 19 周进行了监测。发现气溶胶大小为 0.3-5.0 μm 和 0.5-1.0 μm 的空气中好氧细菌浓度与沙门氏菌之间存在显着的正相关关系。没有发现不同大小的气溶胶浓度与空气中金黄色葡萄球菌或大肠杆菌浓度之间的关系。在 0.3-5.0 μm 气溶胶尺寸范围内发现了与温度和 RH 之间最显着的正相关关系。5.0–10.0 μm 的气溶胶大小与空气温度或 RH 均无关联。空气中的需氧菌和金黄色葡萄球菌都与温度呈强正相关。这些发现将在阐明气溶胶在不同类型空气传播细菌传播中的作用方面发挥关键作用，最终这可能在减轻气溶胶对奶牛场空气传播细菌传播的影响方面发挥重要作用。0 μm 气溶胶尺寸范围。5.0–10.0 μm 的气溶胶大小与空气温度或 RH 均无关联。空气中的需氧菌和金黄色葡萄球菌都与温度呈强正相关。这些发现将在阐明气溶胶在不同类型空气传播细菌传播中的作用方面发挥关键作用，最终这可能在减轻气溶胶对奶牛场空气传播细菌传播的影响方面发挥重要作用。0 μm 气溶胶尺寸范围。5.0–10.0 μm 的气溶胶大小与空气温度或 RH 均无关联。空气中的需氧菌和金黄色葡萄球菌都与温度呈强正相关。这些发现将在阐明气溶胶在不同类型空气传播细菌传播中的作用方面发挥关键作用，最终这可能在减轻气溶胶对奶牛场空气传播细菌传播的影响方面发挥重要作用。