Airborne bacterial emission fluxes from manure-fertilized agricultural soil

Microbial Biotechnology
Nadine ThielUlrich Nübel

Abstract

This is the first study to quantify the dependence on wind velocity of airborne bacterial emission fluxes from soil. It demonstrates that manure bacteria get aerosolized from fertilized soil more easily than soil bacteria, and it applies bacterial genomic sequencing for the first time to trace environmental faecal contamination back to its source in the chicken barn. We report quantitative, airborne emission fluxes of bacteria during and following the fertilization of agricultural soil with manure from broiler chickens. During the fertilization process, the concentration of airborne bacteria culturable on blood agar medium increased more than 600 000-fold, and 1 m3 of air carried 2.9 × 105 viable enterococci, i.e. indicators of faecal contamination which had been undetectable in background air samples. Trajectory modelling suggested that atmospheric residence times and dispersion pathways were dependent on the time of day at which fertilization was performed. Measurements in a wind tunnel indicated that airborne bacterial emission fluxes from freshly fertilized soil under local climatic conditions on average were 100-fold higher than a previous estimate of average emissions from land. Faecal bacteria collected from soil and dus...Continue Reading

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Citations

Jun 26, 2021·Nature Communications·Gaëtane Le ProvostPeter Manning
Jun 29, 2021·EFSA Journal·UNKNOWN EFSA Panel on Biological Hazards (BIOHAZ)Luisa Peixe

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Datasets Mentioned

BETA
PRJEB36824

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BETA
PCR

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spades
Model
Elements
seqsphere
R
COSMO
fasttree
cgMLST
R package ‘
mafft

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