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2017 ; 8
(ä): 14668
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Bioaerosol generation by raindrops on soil
#MMPMID28267145
Joung YS
; Ge Z
; Buie CR
Nat Commun
2017[Mar]; 8
(ä): 14668
PMID28267145
show ga
Aerosolized microorganisms may play an important role in climate change, disease
transmission, water and soil contaminants, and geographic migration of microbes.
While it is known that bioaerosols are generated when bubbles break on the
surface of water containing microbes, it is largely unclear how viable soil-based
microbes are transferred to the atmosphere. Here we report a previously unknown
mechanism by which rain disperses soil bacteria into the air. Bubbles, tens of
micrometres in size, formed inside the raindrops disperse micro-droplets
containing soil bacteria during raindrop impingement. A single raindrop can
transfer 0.01% of bacteria on the soil surface and the bacteria can survive more
than one hour after the aerosol generation process. This work further reveals
that bacteria transfer by rain is highly dependent on the regional soil profile
and climate conditions.