Abstract
The airborne transport of bacteria is a well-known phenomenon, making it possible to exchange species between ecosystems, but it also provides a tool for spreading of pathogenic microorganisms. As part of a large-scale study, microbial community of inhalable and respirable fractions (PM1-10) of resuspended dust collected in Budapest (Hungary) has been characterised by culture-independent next generation sequencing (NGS) of variable 16S rRNA gene regions. Apart from common, mostly ubiqituos soil and organic material-dwelling bacteria, exotic airborne species have been identified, such as Variovorax ginsengisoli, previously isolated from Korean ginseng fields or Exiguobacterium sibiricum, isolated from the Siberian permafrost.
Highlights
Each year, several billion tons of soil-derived dust enter the atmosphere, carrying microorganisms such as bacteria and fungal spores [1]
Airborne bacterial communities are especially frequently monitored during dust events [8]
A. agilis is an ubiquitous soil-dwelling bacterium, in Hungary it has even been isolated from soda pans [15]
Summary
Several billion tons of soil-derived dust enter the atmosphere, carrying microorganisms such as bacteria and fungal spores [1]. While many dust-related studies use culture-based analyses [1], generation sequencing has become a popular and accurate tool if whole communities are to be described [9, 10]. Microbial community of inhalable and respirable fractions of urban resuspended dust has been characterised by culture-independent generation sequencing (NGS) of variable 16S rRNA gene regions.
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