STUDY OF MICROORGANISMS WITHIN THE HOUSING ENVIRONMENT

Heba, K. A., Abdel Aziz,; M. A. I., Howaihy,; Rawhia, A., Arafa,

doi:10.21608/jes.2018.23843

STUDY OF MICROORGANISMS WITHIN THE HOUSING ENVIRONMENT

Document Type : Review Article

Authors

¹ Department of Basic Science, Institute of Environmental Studies & Research, Ain Shams University

² Department of Botany and Microbiology, Faculty of Science, Girl Branch, AL-Azhar University

10.21608/jes.2018.23843

Abstract

Bacteria are found virtually in every environment. High levels of indoor bacteria concentration is an indication of high occupancy rate, poor ventilation, or poor building maintenance. We study airborne Bacteria in Indoor Environments in two residences areas covering summer, winter season to study the climate effect (temperature) also covering high level and low level population to study the quality of life (good aeration, ventilation and variation of occupation area per citizens). We examine the presence of airborne Bacteria in Indoor Environments and colony forming unit for each case and we found that Exiguobacterium sp was the most frequent bacteria (37.5%) in high level population during the Summer climate, Bacillus sp was the most frequent bacteria (26.7%) in high level population during the Winter climate, Brachybacterium sp was the most frequent bacteria (42.4%) during the summer climate and kytococcus sp was the most frequent bacteria (32.2%) in low level population during the winter climate. We found a significant increase in colony forming unit among low level residence population during summer with Minimum, Maximum, Mean value 17.5, 25, 21.69 CFU/m3 respectively than among High level residence population in summer with Minimum, Maximum, Mean value 7.92, 14.58, 10.97 CFU/m3 respectively with p-value <0.001 which indication the negative effect of high occupancy rate, poor ventilation on quality of life and a significant increase in colony forming unit in high level residence population in summer with Minimum, Maximum, Mean value 7.92, 14.58, 10.69 CFU/m3 respectively than in high level residence population in winter with Minimum, Maximum, Mean value 0.42, 2.5, 1.39 CFU/m3 respectively with p-value <0.001 which indicate high level of airborne bacteria due to high temperature .

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