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Issue 2, 2017

Microbial rRNA sequencing analysis of evaporative cooler indoor environments located in the Great Basin Desert region of the United States

Author affiliations

Abstract

Recent studies conducted in the Great Basin Desert region of the United States have shown that skin test reactivity to fungal and dust mite allergens are increased in children with asthma or allergy living in homes with evaporative coolers (EC). The objective of this study was to determine if the increased humidity previously reported in EC homes leads to varying microbial populations compared to homes with air conditioners (AC). Children with physician-diagnosed allergic rhinitis living in EC or AC environments were recruited into the study. Air samples were collected from the child's bedroom for genomic DNA extraction and metagenomic analysis of bacteria and fungi using the Illumina MiSeq sequencing platform. The analysis of bacterial populations revealed no major differences between EC and AC sampling environments. The fungal populations observed in EC homes differed from AC homes. The most prevalent species discovered in AC environments belonged to the genera Cryptococcus (20%) and Aspergillus (20%). In contrast, the most common fungi identified in EC homes belonged to the order Pleosporales and included Alternaria alternata (32%) and Phoma spp. (22%). The variations in fungal populations provide preliminary evidence of the microbial burden children may be exposed to within EC environments in this region.

Graphical abstract: Microbial rRNA sequencing analysis of evaporative cooler indoor environments located in the Great Basin Desert region of the United States

Supplementary files

Article information


Submitted
15 Jul 2016
Accepted
23 Dec 2016
First published
04 Jan 2017

Environ. Sci.: Processes Impacts, 2017,19, 101-110
Article type
Paper

Microbial rRNA sequencing analysis of evaporative cooler indoor environments located in the Great Basin Desert region of the United States

A. R. Lemons, M. B. Hogan, R. A. Gault, K. Holland, E. Sobek, K. A. Olsen-Wilson, Y. Park, J. Park, J. K. Gu, M. L. Kashon and B. J. Green, Environ. Sci.: Processes Impacts, 2017, 19, 101 DOI: 10.1039/C6EM00413J

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