How Acid Adaptation Makes E. coli Resistant to Antibiotics
Author Information
Author(s): Hwang Daekeun, Kim Hyun Jung
Primary Institution: Korea Food Research Institute
Hypothesis
Does acid adaptation in E. coli enhance its resistance to polymyxins through changes in gene expression and outer membrane properties?
Conclusion
Acid adaptation of E. coli NCCP 13719 enhances antimicrobial resistance through changes in gene expression and outer membrane modifications.
Supporting Evidence
- The acid-adapted strain showed an eight-fold increase in resistance to colistin and a two-fold increase for polymyxin B.
- Transcriptomic analysis identified 2225 differentially expressed genes related to antimicrobial resistance.
- Zeta potential measurements indicated a shift toward a less negative surface charge in the acid-adapted strain.
- Decreased outer membrane permeability was observed in the acid-adapted strain, correlating with increased resistance.
Takeaway
When E. coli is exposed to acidic conditions, it can become better at resisting antibiotics, making it harder to treat infections.
Methodology
The study involved acid adaptation of E. coli, followed by transcriptomic analysis to identify differentially expressed genes and antimicrobial susceptibility testing.
Limitations
The study focused on a single strain of E. coli, which may limit the generalizability of the findings to other strains.
Participant Demographics
The study involved the enteroinvasive E. coli strain NCCP 13719.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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