Source avec lien : Journal of Air Pollution and Health, 7(4).
La transmission des bioaérosols par l’air est connue comme une voie importante pour un large éventail d’infections nosocomiales. Par conséquent, dans la présente étude, nous avons cherché à évaluer le type et la diversité des bioaérosols et la résistance aux antibiotiques des bioaérosols bactériens dans les environnements intérieurs de l’hôpital d’éducation et de traitement Sina, à Tabriz, en Iran.
Introduction: Transmission of bioaerosols through the air is known as an important route for a wide range of nosocomial infections. Therefore, in the present study, we aimed to evaluate the type and diversity of bioaerosols and antibiotic resistance of bacterial bioaerosols in the indoor environments of Sina Educational and Treatment Hospital, Tabriz, Iran.Methods and materials: Bioaerosol samples were collected from February to March (winter) and June to July (summer) 2020 in three periods of daytime (morning, noon and evening). After sampling, fungal and bacterial samples were incubated and the disk diffusion agar method (Kirby-Bauer) was used for assessing the antibiotic resistance.Results: the concentration of bioaerosols varied significantly in different wards. In addition, the concentration of bioaerosols in winter was observed to be higher than in summer. The highest and lowest airborne fungal concentrations were found in burns operating room and men’s infectious ward (49 CFU/m3) and children’s burns ward (28 CFU/m3), respectively. The predominantly isolated bacteria were Streptococcus spp. (38%) and Staphylococcus spp. (37%). Also, the main isolated fungi belonged to the genera Aspergillus (75.9%) and Penicillium (22.5%). The highest rates of antibiotic resistance were observed for colistin (100%) in Gram-negative and penicillin (84.2%) in Gram-positive.Conclusion: Timely and regular disinfection of hospital wards can affect the density of bioaerosols. Owing to the prevalence of COVID-19 epidemic in the world, the staff and patients often were wearing masks, gloves and special clothing as well as using disinfectants to prevent coronavirus infection in wards during the summer sampling.