Transmission Methods of Mycoplasma genitalium: How This STI Spreads

Mycoplasma genitalium (MG) is an emerging sexually transmitted bacterium causing growing public health concern. Understanding its transmission routes is critical for effective prevention.

Primary Transmission: Sexual Contact

MG spreads primarily through unprotected sexual contact involving infected mucosal surfaces:

• Vaginal Intercourse: The most common route, especially without condoms
• Anal Intercourse: Rectal transmission is significant in MSM (men who have sex with men)
• Oral Sex: Possible but less common transmission via oral-genital contact
• Genital-Genital Contact: Transmission can occur without penetration through skin-to-skin contact
• Shared Sex Toys: Contaminated toys without disinfection or barrier protection

Transmission Risk Factors

Research shows high infectivity:

• 30-50% transmission rate between partners when one is infected
• Up to 40% rectal infection prevalence in MSM populations
• Multiple sexual partners increases risk substantially
• Asymptomatic carriers (estimated 20-50% of cases) unknowingly spread MG

Other Rare Transmission Routes

While uncommon, these have been documented:

• Mother-to-Child: Vertical transmission during childbirth
• Autoinoculation: Transfer via contaminated fingers to genital area

Evidence-Based Prevention

Effective strategies to block transmission:

Key Recommendations:

1. Use condoms for all sexual acts
2. Get tested if experiencing symptoms (urethritis/cervicitis) or after unprotected exposure
3. Ensure all recent partners (within 2-3 months) get tested/treated concurrently
4. Avoid sexual activity until treatment completion + negative test

Critical Insight: MG is often asymptomatic but can cause serious complications like pelvic inflammatory disease (PID) and infertility. Regular STI screening is vital for sexually active individuals.