Microbial Assessment of Indoor Air Quality of Ventilation Systems

Stanley, H. O. and Onwuna, B. and Ugboma, C. J. (2019) Microbial Assessment of Indoor Air Quality of Ventilation Systems. Asian Journal of Advanced Research and Reports, 3 (4). pp. 1-7. ISSN 2582-3248

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Abstract

The aim of the study was to compare the indoor levels of airborne bacteria and fungi of air conditioned (AC) buildings and naturally ventilated (NV) buildings using a Supermarket, a Laboratory and an Eatery as a case study. The predominant bacterial isolates were Staphylococcus, Micrococcus spp., Escherichia coli, Bacillus spp., Streptococcus spp., Enterococcus spp., Klebsiella spp. The fungal isolates belong to the genera Penicillium, Aspergillus, Mucor, Trichophyton, Fusarium, Candida and Chaetomium. The levels of airborne bacteria and fungi were determined using settle plate method. In AC buildings the average air levels of bacteria (supermarket: 24.2 CFU m-3; laboratory: 29.2 CFU m-3; eatery: 51.0 CFU m-3 air) were higher than in NV (respectively: 54.3 CFU m-3; 100.7 CFU m-3; 134.3 CFU m-3 air). The average air levels for fungal isolates were higher in the eatery due to presence of poorly maintained AC system (supermarket: 7.8 CFU m-3; laboratory: 11.5 CFU m-3; eatery: 56.7 CFU m-3 air) than in NV (28.6 CFU m-3; 19.6 CFU m-3; 13.5 CFU m-3 air respectively). Findings from this study showed that AC buildings had lower levels of bacterial and fungal contamination compared to buildings with natural ventilation.

Item Type: Article
Subjects: Eprint Open STM Press > Multidisciplinary
Depositing User: Unnamed user with email admin@eprint.openstmpress.com
Date Deposited: 28 Apr 2023 07:30
Last Modified: 20 Sep 2023 08:05
URI: http://library.go4manusub.com/id/eprint/86

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