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Evaluating the efficacy of doripenem against Staphylococcus aureus in vancomycin-resistant strains

Boosan Balaji B1, Pitchiah Sivaperumal2, Dhanraj Ganapathy3

  • 1Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Chennai, 602 105, Tamil Nadu, India.

Microbial Pathogenesis
|March 5, 2025
PubMed

Insights

Doripenem shows high effectiveness against Vancomycin-Resistant Staphylococcus aureus (VRSA) infections. Combining doripenem with amoxiclav offers a promising strategy for treating these challenging resistant bacterial infections.

Area of Science:

  • Infectious Diseases
  • Microbiology
  • Pharmacology

Background:

  • Antibiotic susceptibility testing is vital for effective antimicrobial therapy.
  • Vancomycin-Resistant Staphylococcus aureus (VRSA) poses a significant threat due to limited treatment options.

Purpose of the Study:

  • To evaluate the susceptibility of Staphylococcus aureus (SA) clinical isolates to doripenem.
  • To assess the efficacy of doripenem, alone and in combination with amoxiclav, against VRSA.

Main Methods:

  • Minimum Inhibitory Concentration (MIC) and disk diffusion tests were performed on 180 clinical SA isolates.
  • Biofilm inhibition assays were conducted to evaluate antimicrobial activity.

Main Results:

  • Doripenem demonstrated high sensitivity against SA isolates, with MIC50 of 60 μg/mL and MIC90 of 0.5 mg/mL.
  • Doripenem alone and combined with amoxiclav showed consistent biofilm inhibition in VRSA within 48 and 24 hours, respectively.

Conclusions:

  • Doripenem maintains high efficacy against VRSA.
  • The combination of amoxiclav and doripenem is a potential therapeutic option for managing VRSA infections.
Keywords:
AmoxiclavBiofilmDoripenemStaphylococcus aureus (SA)

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