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A multicenter, randomized, controlled, open-label, parallel-group clinical trial in men who have sex with men (MSM) and transgender women with risk sexual behaviors for sexually transmitted infections.

Status
Not yet recruiting
Phases
Phase 4
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2025-525150-19-01
Enrollment
392
Registered
2026-08-06
Start date
Unknown
Completion date
Unknown
Last updated
2026-08-06

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Colonization by methicillin-resistant S. aureus and gut microbiota in users of pre-exposure prophylaxis (PrEP) and people living with HIV (PLHIV) with STIs.

Brief summary

to assess the prevalence of nasal colonization by doxycycline-resistant S. aureus strains

Detailed description

To assess differences in the composition of the baseline gut microbiota and at month 12, To assess the development of resistance in the gut microbiota, To assess the prevalence of infections caused by T. pallidum, C. trachomatis, and N. gonorrhoeae, and doxycycline-resistant C. trachomatis.

Interventions

Sponsors

Instituto De Investigacion Marques De Valdecilla
Lead SponsorOTHER

Eligibility

Sex/Gender
Male
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
to assess the prevalence of nasal colonization by doxycycline-resistant S. aureus strains

Secondary

MeasureTime frame
To assess differences in the composition of the baseline gut microbiota and at month 12, To assess the development of resistance in the gut microbiota, To assess the prevalence of infections caused by T. pallidum, C. trachomatis, and N. gonorrhoeae, and doxycycline-resistant C. trachomatis.

Outcome results

None listed

Source: EU CTIS · Data processed: Aug 7, 2026