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Raman-Deuterium Isotope Probing for in-situ identification of antimicrobial resistant bacteria in Thames River

Abstract:
The emergence and widespread distribution of antimicrobial resistant (AMR) bacteria has led to an increasing concern with respect to potential environmental and public health risks. Culture-independent and rapid identification of AMR bacteria in-situ in complex environments is important in understanding the role of non-culturable bacteria and in revealing potential pathogens with resistance. In this study, a culture-independent and non-destructive phenotyping approach, so called Raman Deuterium Stable Isotope Probing (Raman-DIP), was developed to identify AMR bacteria in the River Thames. It is demonstrated that Raman-DIP was able to accurately identify resistant and susceptible bacteria within 24 hours. The work shows that, in the River Thames, the majority of the bacteria (76±2%) were metabolically active, whilst AMR bacteria to carbenicillin, kanamycin and both two antibiotics were 35±5%, 28±3%, 25±1% of the total bacteria respectively. Raman activated cell ejection (RACE) was applied to isolate single AMR bacterial cells for the first time, linking AMR phenotype and genotype (DNA sequence). The sequence of the isolates indicates that they were potential human pathogens Aeromonas sp., Stenotrophomonas sp. and an unculturable bacterium. This work demonstrates Raman-DIP and RACE are effective culture-independent approach for rapid identification of AMR bacteria at the single cell level in their natural conditions.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1038/s41598-017-16898-x

Authors


More by this author
Institution:
University of Oxford
Division:
MPLS Division
Department:
Engineering Science
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS Division
Department:
Engineering Science
Role:
Author


Publisher:
Nature Publishing Group
Journal:
Scientific Reports More from this journal
Publication date:
2017-11-30
Acceptance date:
2017-11-10
DOI:
EISSN:
2045-2322
ISSN:
2045-2322


Keywords:
Pubs id:
pubs:797223
UUID:
uuid:74c1e158-a07b-4d09-b9d7-de0933dab7ff
Local pid:
pubs:797223
Source identifiers:
797223
Deposit date:
2017-11-25

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