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Let's not forget about Mycoplasma genitalium

Jeffrey D Jenks1,2

  • 1Durham County Department of Public Health, Durham, NC, USA.

Sexual Health
|November 19, 2025
PubMed

Insights

Doxycycline pre-exposure prophylaxis (Doxy-PEP) may increase antimicrobial resistance in Mycoplasma genitalium. Surveillance of M. genitalium antibiotic resistance is crucial as Doxy-PEP use expands for STI prevention.

Area of Science:

  • Public Health
  • Infectious Diseases
  • Antimicrobial Resistance

Background:

  • Doxycycline pre-exposure prophylaxis (Doxy-PEP) is a strategy to prevent sexually transmitted infections (STIs), particularly among men who have sex with men.
  • Concerns exist regarding the potential for increased antimicrobial resistance with widespread Doxy-PEP use.
  • Mycoplasma genitalium is a pathogen frequently treated with doxycycline and is prone to developing resistance.

Purpose of the Study:

  • To analyze the public health ethics surrounding Doxy-PEP.
  • To highlight the potential impact of Doxy-PEP on antimicrobial resistance.
  • To emphasize the need for surveillance of Mycoplasma genitalium antibiotic resistance.

Main Methods:

  • Literature review and ethical analysis of Doxy-PEP.
  • Discussion of antimicrobial resistance patterns related to tetracyclines.
  • Examination of Mycoplasma genitalium's susceptibility to doxycycline.

Main Results:

  • Doxy-PEP may contribute to the rise of tetracycline-resistant pathogens.
  • Mycoplasma genitalium resistance to doxycycline is a significant concern.
  • Increased Doxy-PEP use necessitates proactive resistance monitoring.

Conclusions:

  • Antimicrobial resistance surveillance in Mycoplasma genitalium must be prioritized.
  • The ethical implementation of Doxy-PEP requires careful consideration of resistance.
  • Balancing STI prevention with antimicrobial stewardship is essential.
Keywords:
Chlamydia trachomatisDoxy PEPMycoplasma genitaliumNeisseria gonorrhoeaeantibiotic resistancedoxycycline post-exposure prophylaxisresistance testingsexually transmitted infections

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