Ding Luyu, Zhang Qing, Yu Ligen, Jiang Ruixiang, Yao Chunxia, Wang Chaoyuan, Li Qifeng
Information Technology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China.
National Engineering Research Center for Information Technology in Agriculture (NERCITA), Beijing 100097, China.
Animals (Basel). 2024 Dec 18;14(24):3649. doi: 10.3390/ani14243649.
Inspired by the effects of solar or UV radiation on the decay of airborne bacteria during their transport, this study investigated the effect of UVA on the decay of airborne bacteria from cattle houses and analyzed the potential use of UVA to reduce indoor airborne bacteria under laboratory conditions. Airborne bacteria from the cattle source were generated and released into a small-scale test chamber (1.5 m) with different strategies according to the different objectives in decay tests and simulated sterilization tests. Increasing with the UVA radiation gradients (0, 500, 1000, 1500 μW cm), the average decay rate of total curable airborne bacteria ranged from 2.7% to 61.6% in decay tests. Under the combination of different UVA radiation intensities (2000 μW cm in maximum) and radiation durations (60 min in maximum), simulated sterilization tests were conducted to examine the potential use of UVA radiation for air sterilization in animal houses. With the dynamic inactive rate (DIR) ranging from 17.2% to 62.4%, we proved that UVA may be an alternative way to reduce the indoor airborne bacteria in cattle houses if applied properly. Similar effects would be achieved using either a high radiation intensity with a short radiation duration or a low radiation intensity with a long radiation duration.
受太阳或紫外线辐射对空气中细菌在传播过程中衰变影响的启发，本研究调查了紫外线A（UVA）对牛舍空气中细菌衰变的影响，并分析了在实验室条件下利用UVA减少室内空气中细菌的可能性。根据衰变试验和模拟杀菌试验的不同目标，采用不同策略产生来自牛源的空气传播细菌，并将其释放到一个小型试验箱（1.5米）中。在衰变试验中，随着UVA辐射梯度（0、500、1000、1500微瓦/平方厘米）的增加，可治愈的空气传播细菌的平均衰变率在2.7%至61.6%之间。在不同UVA辐射强度（最大2000微瓦/平方厘米）和辐射持续时间（最大60分钟）的组合下，进行了模拟杀菌试验，以检验UVA辐射在动物舍空气杀菌中的潜在用途。动态失活率（DIR）在17.2%至62.4%之间，我们证明，如果应用得当，UVA可能是减少牛舍室内空气传播细菌的一种替代方法。使用高辐射强度和短辐射持续时间或低辐射强度和长辐射持续时间都能达到类似效果。
