Alamirew Tamagnu Sintie, Baraki Negga, Gawo Abraham Geremew, Melake Bealemlay Abebe, Endalew Salie Mulat, Mengistu Dechasa Adare, Alemu Fekade Alemu, Tolera Sina Temesgen, Temesgen Liku Muche, Bayu Kefelegn
School of Environmental Health, College of Health and Medical Sciences, Haramaya University, Harar, Ethiopia.
Multidiscip Respir Med. 2024 Nov 4;19(1):965. doi: 10.5826/mrm.2024.965.
Bacterial indoor air load refers to the level of bacteria within and around dwellings and other structures. Pathogens, bacterial cell fragments, and bacterial organisms' byproducts can all pose major issues indoors, especially in prison inmate cells. However, there is lack of data on bacterial load and contributing factors in the East Hararghe zone and Harari regional state. The lack of studies on microbiological indoor air quality in prisons with contributing factors will therefore be filled by this investigation.
The study aimed to assess bacterial indoor air load and contributing factors in prison inmate cells from October 1 to October 30, 2020.
An institutional cross-sectional study was employed. All of the prisons in the East Hararghe zone and the Harari regional state served as the study's and source population. 62 prison cells were used in the investigation. Samples were obtained using the passively settling plate technique. The data were evaluated through the use of SPSS statistical software, Excel, and the statistical procedures of ANOVA, correlation, and chi-square test.
The maximum and minimum bacterial loads, were recorded at 8:00 am (3027 CFU/m3) and 2:00 pm (1048 (CFU/m3) respectively. The correlation between the temperature and bacterial load was strongly positive (r = 0.680, p = 0.047), and the correlation of the moisture content and bacterial load was strongly negative (r = -0.671, p = 0.039).
The levels of bacteria were higher than the guideline (2000 CFU/m3). While the relative humidity of indoor air was negatively correlated with bacterial load, temperature and bacterial load were significantly positively correlated. Harari regional state and East Hararghe zone prison commissions should be alarmed to alleviate these problems. The building standards need to be completely updated to the latest standards.
室内空气细菌负荷是指住宅和其他建筑物内部及周围的细菌水平。病原体、细菌细胞碎片和细菌生物体的副产品都可能在室内引发重大问题，尤其是在监狱牢房中。然而，东哈拉尔格地区和哈勒尔地区缺乏关于细菌负荷及其影响因素的数据。因此，本调查将填补这一空白，即对影响因素与监狱室内空气质量的研究空白。
本研究旨在评估2020年10月1日至10月30日期间监狱牢房内的室内空气细菌负荷及其影响因素。
采用机构横断面研究。东哈拉尔格地区和哈勒尔地区的所有监狱均作为研究的总体和源人群。调查中使用了62间监狱牢房。样本采用被动沉降平板技术采集。数据通过使用SPSS统计软件、Excel以及方差分析、相关性分析和卡方检验等统计程序进行评估。
最大和最小细菌负荷分别记录在上午8:00（3027 CFU/m³）和下午2:00（1048 CFU/m³）。温度与细菌负荷之间的相关性呈强正相关（r = 0.680，p = 0.047），水分含量与细菌负荷的相关性呈强负相关（r = -0.671，p = 0.039）。
细菌水平高于指导标准（2000 CFU/m³）。室内空气相对湿度与细菌负荷呈负相关，而温度与细菌负荷呈显著正相关。哈勒尔地区和东哈拉尔格地区的监狱委员会应警惕以缓解这些问题。建筑标准需要完全更新至最新标准。
