Influence of temperature and humidity on the dynamics of aerosol numbers and airborne bacteria in a dairy calf house

被引：24
|
作者：
Islam M.A. [1 ,4 ]
Ikeguchi A. [2 ]
Naide T. [3 ]
机构：
[1] Department of Agricultural and Environmental Engineering, United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, 183-8509, Tokyo
[2] Department of Environmental Engineering, Faculty of Agriculture, Utsunomiya University, 350 Minemachi, Utsunomiya
[3] Earth Environmental Service Co., Ltd., 17 Kanda-konyacho, Chiyodaku, 101-0035, Tokyo
[4] Department of Medicine, Faculty of Veterinary Medicine and Animal Science, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur
来源：
Biosystems Engineering | 2020年 / 194卷
关键词：
Airborne bacteria; Particles; Relationship; RH; Temperature; The colder months;
D O I：
10.1016/j.biosystemseng.2020.04.003
中图分类号：
学科分类号：
摘要：
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. © 2020 IAgrE
引用
收藏
页码：213 / 226
页数：13
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