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Seasonal variation and size distribution in the airborne indoor microbial concentration of residential houses in Delhi and its impact on health

Exposure of microbial agents in the air of indoor dwellings is associated with effects on respiratory and general health. The current study was conducted in the urban area of Delhi Metropolis for the seasonal quantitative assessment of viable microbial indoor air quality. Bioaerosol measurement was...

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Autores principales: Kumar, Pradeep, Singh, A. B., Singh, Rajeev
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Netherlands 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8254435/
https://www.ncbi.nlm.nih.gov/pubmed/34248257
http://dx.doi.org/10.1007/s10453-021-09718-3
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author Kumar, Pradeep
Singh, A. B.
Singh, Rajeev
author_facet Kumar, Pradeep
Singh, A. B.
Singh, Rajeev
author_sort Kumar, Pradeep
collection PubMed
description Exposure of microbial agents in the air of indoor dwellings is associated with effects on respiratory and general health. The current study was conducted in the urban area of Delhi Metropolis for the seasonal quantitative assessment of viable microbial indoor air quality. Bioaerosol measurement was conducted by using Anderson six stage impactor with cut-off diameters of 7.0, 4.7, 3.3, 2.1, 1.1, and 0.65 µm) throughout the all the seasons (April 2019 to March 2020). Meteorological parameters such as temperature and relative humidity were measured to check their effect on microbial survival. Air quality index data of the sampling area were recorded by DPCC air quality monitoring system, Ashok Vihar, Delhi. The highest (1654 ± 876.87 CFU/m(3)) and lowest (738 ± 443.59 CFU/m(3)) mean bacterial concentration in houses was recorded in August and December, respectively. Similarly, the highest fungal concentration (1275 ± 645.22 CFU/m(3)) was found in August and the lowest in (776 ± 462.46 CFU/m(3)) in January. Bacterial respirable fraction shows an irregular pattern in different seasons. In the case of fungi, the respirable fraction of 2.1 and 1.1 contributes more than 60% of total culturable bioaerosols in all seasons. Bacterial genera including Staphylococcus, Micrococcus, and Streptobacillus were most dominant, and Cladosporium, Aspergillus, Penicillium, and Alternaria were the most dominant fungal genera observed indoors. The results of this study suggest that higher respirable fungal fraction might penetrate deeper into the lungs and cause various health effects. A higher concentration of bioaerosols in outdoor areas than indoor shows that the source of indoor bioaerosols is outdoor air. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s10453-021-09718-3.
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spelling pubmed-82544352021-07-06 Seasonal variation and size distribution in the airborne indoor microbial concentration of residential houses in Delhi and its impact on health Kumar, Pradeep Singh, A. B. Singh, Rajeev Aerobiologia (Bologna) Original Paper Exposure of microbial agents in the air of indoor dwellings is associated with effects on respiratory and general health. The current study was conducted in the urban area of Delhi Metropolis for the seasonal quantitative assessment of viable microbial indoor air quality. Bioaerosol measurement was conducted by using Anderson six stage impactor with cut-off diameters of 7.0, 4.7, 3.3, 2.1, 1.1, and 0.65 µm) throughout the all the seasons (April 2019 to March 2020). Meteorological parameters such as temperature and relative humidity were measured to check their effect on microbial survival. Air quality index data of the sampling area were recorded by DPCC air quality monitoring system, Ashok Vihar, Delhi. The highest (1654 ± 876.87 CFU/m(3)) and lowest (738 ± 443.59 CFU/m(3)) mean bacterial concentration in houses was recorded in August and December, respectively. Similarly, the highest fungal concentration (1275 ± 645.22 CFU/m(3)) was found in August and the lowest in (776 ± 462.46 CFU/m(3)) in January. Bacterial respirable fraction shows an irregular pattern in different seasons. In the case of fungi, the respirable fraction of 2.1 and 1.1 contributes more than 60% of total culturable bioaerosols in all seasons. Bacterial genera including Staphylococcus, Micrococcus, and Streptobacillus were most dominant, and Cladosporium, Aspergillus, Penicillium, and Alternaria were the most dominant fungal genera observed indoors. The results of this study suggest that higher respirable fungal fraction might penetrate deeper into the lungs and cause various health effects. A higher concentration of bioaerosols in outdoor areas than indoor shows that the source of indoor bioaerosols is outdoor air. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s10453-021-09718-3. Springer Netherlands 2021-07-03 2021 /pmc/articles/PMC8254435/ /pubmed/34248257 http://dx.doi.org/10.1007/s10453-021-09718-3 Text en © The Author(s), under exclusive licence to Springer Nature B.V. 2021 This article is made available via the PMC Open Access Subset for unrestricted research re-use and secondary analysis in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the World Health Organization (WHO) declaration of COVID-19 as a global pandemic.
spellingShingle Original Paper
Kumar, Pradeep
Singh, A. B.
Singh, Rajeev
Seasonal variation and size distribution in the airborne indoor microbial concentration of residential houses in Delhi and its impact on health
title Seasonal variation and size distribution in the airborne indoor microbial concentration of residential houses in Delhi and its impact on health
title_full Seasonal variation and size distribution in the airborne indoor microbial concentration of residential houses in Delhi and its impact on health
title_fullStr Seasonal variation and size distribution in the airborne indoor microbial concentration of residential houses in Delhi and its impact on health
title_full_unstemmed Seasonal variation and size distribution in the airborne indoor microbial concentration of residential houses in Delhi and its impact on health
title_short Seasonal variation and size distribution in the airborne indoor microbial concentration of residential houses in Delhi and its impact on health
title_sort seasonal variation and size distribution in the airborne indoor microbial concentration of residential houses in delhi and its impact on health
topic Original Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8254435/
https://www.ncbi.nlm.nih.gov/pubmed/34248257
http://dx.doi.org/10.1007/s10453-021-09718-3
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