Development and selection of low-level multi-drug resistance over an extended range of sub-inhibitory ciprofloxacin concentrations in Escherichia coli.
Sci Rep
; 10(1): 8754, 2020 05 29.
Article
in En
| MEDLINE
| ID: mdl-32471975
ABSTRACT
To better combat bacterial antibiotic resistance, a growing global health threat, it is imperative to understand its drivers and underlying biological mechanisms. One potential driver of antibiotic resistance is exposure to sub-inhibitory concentrations of antibiotics. This occurs in both the environment and clinic, from agricultural contamination to incorrect dosing and usage of poor-quality medicines. To better understand this driver, we tested the effect of a broad range of ciprofloxacin concentrations on antibiotic resistance development in Escherichia coli. We observed the emergence of stable, low-level multi-drug resistance that was both time and concentration dependent. Furthermore, we identified a spectrum of single mutations in strains with resistant phenotypes, both previously described and novel. Low-level class-wide resistance, which often goes undetected in the clinic, may allow for bacterial survival and establishment of a reservoir for outbreaks of high-level antibiotic resistant infections.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Ciprofloxacin
/
Drug Resistance, Multiple, Bacterial
/
Escherichia coli
Type of study:
Prognostic_studies
Language:
En
Journal:
Sci Rep
Year:
2020
Document type:
Article
Affiliation country:
United States