Skip to main content
Log in

Modulation of fluoroquinolone resistance by Lippia origanoides Kunth in Staphylococcus aureus

  • Research Articles
  • Published:
Vegetos Aims and scope Submit manuscript

Abstract

In this study, the ethanolic extract, and the dichloromethane fraction from L. origanoides were assessed for their antibacterial activity alone or in combination with fluoroquinolones against a S. aureus strain resistant to hydrophilic fluoroquinolones due to overexpression of the norA gene encoding the NorA efflux pump, aiming to investigate the occurrence of efflux pump inhibitors in this plant. Minimal inhibitory concentrations (MICs) and modulatory activity on resistance to fluoroquinolones of the extracts were determined by a micro-dilution assay. The ethanolic extract showed weak anti-staphylococci activity, while the dichloromethane extract demonstrated moderate antimicrobial activity against the strains tested. The addition of ethanolic and dichloromethane extracts to the growth medium at sub-inhibitory concentrations enhanced the activity of norfloxacin and ciprofloxacin, as well as ethidium bromide, against S. aureus SA1199-B overproducing NorA. L. origanoides can be a source of secondary metabolites able to inhibit the S. aureus NorA efflux pump.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4

Similar content being viewed by others

Availability of data and materials

All data generated or analyzed during this study are included in the article.

Abbreviations

MRSA:

Methicillin resistant S. aureus

LOEE:

Ethanol extract of Lippia origanoides

LODCM:

Dichloromethane fraction of Lippia origanoides

ATCC:

American Type Culture Collection

BHI:

Brain hearth infusion

MICs:

Minimal inhibitory concentrations

ANOVA:

Analysis of variance

References

Download references

Acknowledgements

We are grateful to Dr. Glenn W. Kaatz (Wayne State University, USA) who kindly provided us with the SA1199-B strain.

Funding

This research was funded by the Fundação de Amparo à Pesquisa do Estado do Piauí (Grant Number: 050/2019), CNPq and Universidade Federal do Piauí.

Author information

Authors and Affiliations

Authors

Contributions

The authors confirm contribution to the paper as follows: study conception and design: HMB, HDMC, and JPSJ. Data collection: FAAO, GMDL, JNS, BCGVL, and JSLN. Analysis and interpretation of results: HMB, GSF, DRJF, JHLF, and JSLN. Draft manuscript preparation: HMB, AMGLC. All authors reviewed the results and approved the final version of the manuscript.

Corresponding authors

Correspondence to Henrique Douglas Melo Coutinho or Humberto Medeiros Barreto.

Ethics declarations

Conflict of interest

The authors declare that they have no conflicts of interest to report regarding the present study.

Ethical approval

Not applicable.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Supplementary Information

Below is the link to the electronic supplementary material.

Supplementary file1 (DOCX 54 KB)

Rights and permissions

Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

de Alcantara Oliveira, F.A., Lemos, G.M.D., de Sousa, J.N. et al. Modulation of fluoroquinolone resistance by Lippia origanoides Kunth in Staphylococcus aureus. Vegetos (2024). https://doi.org/10.1007/s42535-023-00783-2

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1007/s42535-023-00783-2

Keywords

Navigation