Nasiri Najimeh, Gholipour Sahar, Akbari Hossein, Koolivand Ali, Abtahi Hamid, Didehdar Mojtaba, Rezaei Arezou, Mirzaei Nezam
Department of Environmental Health Engineering, Social Determinants of Health (SDH) Research Center, Kashan University of Medical Sciences, Kashan, Iran.
Student Research Committee, Kashan University of Medical Sciences, Kashan, Iran.
J Environ Health Sci Eng. 2021 Feb 27;19(1):663-670. doi: 10.1007/s40201-021-00637-6. eCollection 2021 Jun.
Bacterial and fungal bioaerosols are a global concern due to nosocomial infections, especially in developing countries. Our study aimed to detect fungal and bacterial bioaerosols in different wards of an obstetrics and gynecology hospital air samples. 240 bioaerosol samples were collected by performing impaction method from different wards of a hospital in the central part of Iran, during two seasons. Fungi genera and bacteria species are recognized by cultivation. Concentrations of bacteria and fungi were ranged from 44 to 75 CFU/m and 8 to 22 CFU/m, respectively. Labor Delivery and Recovery (LDR) and Emergency room had first and second most contaminated air among all the hospital wards. No significant difference between microbial load of wards which used natural ventilation and heating, ventilating, and air conditioning (HVAC) system was observed. The microbial load was not affected significantly by temperature, working shift, and Inpatient Bed Occupancy Rate (IBOR). Fungal load related significantly with relative humidity. (detected in 48.3% of samples) and (27%) were the most predominant isolated bacteria and fungi, respectively. The results revealed that the level of bacteria and fungi responsible for nosocomial infections in the air of this hospital is very low. Although levels of microbial contamination are relatively low, it is important to investigate the effect of bioaerosols on nosocomial infections, especially in neonates.
由于医院感染，尤其是在发展中国家，细菌和真菌生物气溶胶成为全球关注的问题。我们的研究旨在检测一家妇产科医院不同病房空气样本中的真菌和细菌生物气溶胶。在两个季节里，通过撞击法从伊朗中部一家医院的不同病房采集了240份生物气溶胶样本。通过培养识别真菌属和细菌种类。细菌和真菌的浓度分别为44至75 CFU/m和8至22 CFU/m。在所有医院病房中，分娩及恢复室（LDR）和急诊室的空气污染最为严重，分别位列第一和第二。在使用自然通风以及供暖、通风与空调（HVAC）系统的病房之间，未观察到微生物负荷存在显著差异。微生物负荷不受温度、工作班次和住院床位占用率（IBOR）的显著影响。真菌负荷与相对湿度显著相关。检出率分别为48.3%的样本和27%的样本中，分别是最主要的分离细菌和真菌。结果显示，该医院空气中导致医院感染的细菌和真菌水平非常低。尽管微生物污染水平相对较低，但研究生物气溶胶对医院感染的影响很重要，尤其是对新生儿的影响。
