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Year : 2020  |  Volume : 9  |  Issue : 1  |  Page : 21

A comparative evaluation of bioaerosol emission and particle matter concentration in Urban primary schools

1 Department of Environmental Health Engineering, School of Health, Arak University of Medical Sciences, Arak, Iran
2 Student Research Committee, School of Health, Arak University of Medical Sciences, Arak, Iran

Correspondence Address:
Seyed Hamed Mirhoseini
Department of Environmental Health Engineering, School of Health, Ghods Street, Golestan quarter, Arak
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ijehe.ijehe_30_20

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Aim: In this study, the levels of indoor and outdoor (I/O) airborne particles and bioaerosols were assessed in two primary schools. Simultaneously, I/O microbial airborne and particle matter (PM) concentrations were analyzed during the autumn of 2018. Materials and Methods: A total of 96 I/O air samples were taken by using a single-stage Andersen sampler from two selected primary schools located in Arak, Iran. Simultaneous with sampling, PM10 and PM2.5 concentrations, temperature, and relative humidity were also measured. Results: The results indicated that the mean levels of indoor airborne bacteria and fungi were 448 and 94 CFU/m3, respectively. The I/O ratios of bacteria and fungi were 2.1 and 0.7, respectively. The airborne bacteria levels showed a weak-positive and moderate-positive association with PM2.5 (r = 0.28, P < 0.05) and PM10 (r = 0.32, P < 0.05), respectively. Further, a moderate-positive association was observed between indoor fungi and the PM2.5 (r = 0.46, P < 0.05) and PM10 (r = 0.30, P < 0.05). In our study, the most fungal species identified were Penicillium, Cladosporium, and Aspergillus, and Staphylococcus spp., Micrococcus spp., and Bacillus spp. were the most frequently founded indoor bacteria. Conclusion: Comparative analysis of classrooms in two schools showed that indoor sources and building conditions have a key role in indoor air quality.

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