Selection of Resistant Bacteria at Very Low Antibiotic Concentrations
Author Information
Author(s): Gullberg Erik, Cao Sha, Berg Otto G., Ilbäck Carolina, Sandegren Linus, Hughes Diarmaid, Andersson Dan I.
Primary Institution: Uppsala University
Hypothesis
Can resistant bacteria be selected at very low antibiotic concentrations?
Conclusion
The study shows that resistant bacteria can be selected even at extremely low antibiotic concentrations, which has implications for understanding antibiotic resistance in natural environments.
Supporting Evidence
- Resistant bacteria can be selected at antibiotic concentrations far below the minimal inhibitory concentration.
- De novo resistant mutants can arise at sub-MIC levels of antibiotics.
- Low antibiotic concentrations in the environment may contribute to the persistence of antibiotic resistance.
Takeaway
Even tiny amounts of antibiotics can help bacteria become resistant, which is a big problem for treating infections.
Methodology
The study used competition experiments between susceptible and resistant bacterial strains at various antibiotic concentrations to assess selection for resistance.
Limitations
The study primarily focuses on laboratory conditions, which may not fully replicate complex natural environments.
Digital Object Identifier (DOI)
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