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Antibiotic resistance is a major public health concern that arises when bacteria evolve mechanisms to withstand the effects of antibiotic treatments. This resistance can be intrinsic, acquired through genetic mutations, or transferred between bacteria via horizontal gene transfer. The development of antibiotic resistance poses significant challenges in treating bacterial infections and necessitates ongoing research to develop new therapeutic strategies.Intrinsic resistance occurs when bacterial...
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Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
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Bacteriophages, also known as phages, are specialized viruses that infect bacteria. A key characteristic of phages is their distinctive “head-tail” morphology. A phage begins the infection process (i.e., lytic cycle) by attaching to the outside of a bacterial cell. Attachment is accomplished via proteins in the phage tail that bind to specific receptor proteins on the outer surface of the bacterium. The tail injects the phage’s DNA genome into the bacterial cytoplasm. In the...
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Related Experiment Video

Updated: Jan 18, 2026

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Reprogramming resistance: phage-antibiotic synergy targets efflux systems in ESKAPEE pathogens.

Anita Tarasenko1, Bhavya N Papudeshi1, Susanna R Grigson1

  • 1Flinders Accelerator for Microbiome Exploration, College of Science and Engineering, Flinders University, Adelaide, South Australia, Australia.

Mbio
|September 8, 2025
PubMed
Summary

Multidrug-resistant (MDR) and extensively drug-resistant (XDR) ESKAPE pathogens are a global threat. Bacteriophage therapy offers a promising alternative by targeting specific resistance mechanisms, potentially overcoming antibiotic resistance.

Keywords:
ESKAPEE pathogensefflux pump inhibitionmultidrug resistance (MDR)phage therapyphage-antibiotic synergy

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Area of Science:

  • Microbiology
  • Infectious Diseases
  • Biotechnology

Background:

  • Multidrug-resistant (MDR) and extensively drug-resistant (XDR) ESKAPE pathogens present a critical global health challenge.
  • These bacteria employ diverse intrinsic and acquired resistance mechanisms, including capsule formation, biofilm production, β-lactamase activity, and efflux pumps.

Purpose of the Study:

  • To review mechanistic insights into phage-antibiotic synergy, focusing on efflux pump-mediated resistance.
  • To discuss emerging therapeutic strategies and clinical applications of bacteriophages against drug-resistant bacteria.

Main Methods:

  • Literature review of phage-antibiotic synergy mechanisms.
  • Analysis of bacteriophage therapeutic potential against MDR/XDR ESKAPE pathogens.
  • Examination of translational frameworks for phage therapy integration.

Main Results:

  • Bacteriophages (phages) offer a precision-based therapeutic alternative by targeting specific bacterial resistance mechanisms.
  • Phage therapy can enhance antibiotic uptake and impose fitness costs on resistant strains, restoring susceptibility.
  • Phage-antibiotic synergy, particularly against efflux pump-mediated resistance, shows promise for combating difficult-to-treat infections.

Conclusions:

  • Bacteriophage therapy is a viable strategy to combat MDR/XDR ESKAPE pathogens.
  • Overcoming challenges in phage resistance, production, and regulation is crucial for clinical integration.
  • Phage therapy holds potential to revolutionize the management of drug-resistant bacterial infections.