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Airborne bacteria associated with particulate matter from a highly urbanised metropolis:A potential risk to the population’s health

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Frontiers of Environmental Science & Engineering 2022年第9期16卷 99-114页

作者： María del Carmen Calderón-Ezquerro elizabeth selene gómez-acata Carolina Brunner-Mendoza Instituto de Ciencias de la Atmósfera y Cambio Climático Universidad Nacional Autónoma de MéxicoCiudad de México 04510Mexico Facultad de Medicina Universidad Nacional Autónoma de MéxicoCiudad de México 04510Mexico

Bacteria in the air present patterns in space and time produced by different sources and environmental *** studies have focused on the link between airborne pathogenic bacteria in densely populated cities,and the risk to the population’s *** associated with particulate matter(PM)were monitored from the air of Mexico City(Mexico).We employed a metagenomic approach to characterise bacteria using the 16S rRNA *** bacteria sampling was carried out in the north,centre,and south of Mexico City,with different urbanisation rates,during *** added to the particles were sampled using high-volume PM_(10) *** ascertain significant differences in bacterial diversity between zones and seasons,the Kruskal-Wallis,Wilcoxon tests were done on alpha diversity ***-three air samples were collected,and DNA was sequenced using next-generation *** results indicated that the bacterial phyla in the north and south of the city were Firmicutes,Cyanobacteria,Proteobacteria,and Actinobacteria,while in the central zone there were more *** were no differences in the alpha diversity indices between the sampled *** to the OTUs,the richness of bacteria was higher in the central *** diversity was higher in the rainy season than in the dry season;the Shannon index and the OTUs observed were higher in the central zone in the dry *** bacteria such as Kocuria,Paracoccus,and Micrococcus predominated in both seasonal times,while Staphylococcus,Corynebacterium,and Nocardioides were found during the rainy season,with a presence in the central zone.

关键词： Airborne bacteria Urbanisation PM10 Mexico City Microbiome

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