Antibiotic Publish-Intercourse Reduces the Danger of STIs by 66%

Nonetheless, the analysis additionally revealed a slight enhance in antibacterial resistance that requires additional exploration, the authors discovered.

Specialists say that efficient strategies for stopping sexually transmitted infections are desperately wanted. That is an encouraging discovering that would assist cut back the variety of sexually transmitted infections in populations most in danger.

The Rise of STIs

The incidence of STIs has been growing in the USA over the previous few years, disproportionately impacting homosexual males and transgender girls.

An estimated 2.5 million circumstances of syphilis, gonorrhea, and chlamydia occurred in 2021 up from 2.4 million circumstances in 2020, in keeping with the Facilities for Illness Management and Prevention. If left untreated, STIs can result in critical well being penalties, together with mind and nerve issues, blindness, infertility, and an elevated threat of HIV acquisition. Antimicrobial resistance amongst STIs is an rising public well being menace, notably with Neisseria gonorrhoeae, and threatens out there remedy choices.

Concerning the Research

The research included 501 adults at 4 clinic websites in San Francisco and Seattle who had been no less than 18 years of age; assigned male intercourse at delivery; reported sexual exercise with a person within the earlier yr; identified with HIV or taking or planning to take pre-exposure prophylaxis (PrEP) remedy to stop HIV acquisition; and identified with gonorrhea, chlamydia or early syphilis within the prior yr. Of these enrolled, 327 individuals had been taking HIV PrEP medicines, and 174 individuals had been folks dwelling with HIV.

Contributors had been randomly assigned to obtain both doxy-PEP or standard-of-care. These within the doxy-PEP arm had been instructed to take one 200 milligram (mg) doxycycline-delayed launch pill, ideally inside 24 hours however no later than 72 hours after condomless intercourse.

Doxycycline is a broad-spectrum antibiotic in a household referred to as tetracyclines. Contributors had been assessed by research workers each three months for adherence and uncomfortable side effects to the remedy routine and examined for STIs. Participant acceptability of the remedy was assessed at six-and-12-month clinic visits. An impartial knowledge and security monitoring board reviewed the research progress and security and effectiveness knowledge each six months.

How Doxycycline Results STIs

Amongst individuals on HIV PrEP, no less than a number of STIs had been identified in 10.7% of quarterly clinic visits within the doxy-PEP research arm in comparison with 31.9% of visits within the standard-of-care arm.

Amongst research individuals dwelling with HIV, a number of STIs had been identified in 11.8% of quarterly visits within the doxy-PEP arm versus 30.5% within the standard-of-care arm.

Gonorrhea was probably the most continuously identified STI within the research. Contributors reported good adherence to the remedy routine with 86.2% reporting taking doxy-PEP constantly inside 72 hours of condomless intercourse, and 71.3% reported by no means lacking a dose. No security or acceptability points had been recognized within the research.

Contemplate Doxy-PEP for Males’s Sexual Well being

“Given its demonstrated efficacy in a number of trials, doxy-PEP must be thought-about as a part of a sexual well being package deal for males who’ve intercourse with males and transwomen if they’ve an elevated threat of STIs,” in keeping with Annie Luetkemeyer, M.D., professor of infectious illnesses at Zuckerberg San Francisco Common Hospital at UCSF, and co-principal investigator of the research.

“Will probably be vital to observe the affect of doxy-PEP on antimicrobial resistance patterns over time and weigh this in opposition to the demonstrated advantage of decreased STIs and related decreased antibiotic use for STI remedy in males at elevated threat for recurrent STIs.”

Doxy-PEP is probably not Efficient In opposition to Gonorrhea

In analyzing the potential for antimicrobial resistance throughout doxy-PEP use, the researchers found tetracycline resistance in a higher variety of incident gonorrhea strains amongst these within the doxy-PEP arm than amongst these within the standard-of-care group (38.5% versus 12.5%, respectively).

This implies that doxy-PEP might provide much less safety in opposition to gonorrhea strains which are already tetracycline-resistant and that wider population-based surveillance for any such resistance is vital.

Doxy-PEP Additionally Decreased Staphylococcus Pores and skin Infections

Moreover, the researchers discovered that doxy-PEP decreased Staphylococcus aureus—a micro organism generally discovered on the pores and skin ‘colonization’—by 50% after a yr.

Nevertheless, in those that nonetheless had Staphylococcus aureus colonization at month 12, a modestly increased proportion of these within the doxy-PEP group had doxycycline resistance (16% vs 8%). That is vital as a result of doxycycline could also be used to deal with methicillin-resistant Staphylococcus aureus pores and skin and mushy tissue infections.

Further analysis and longer follow-up intervals are wanted to look at the potential antimicrobial resistance impact of intermittent doxy-PEP use. Doxy-PEP use in different populations disproportionately impacted by STIs, together with girls with HIV and people taking HIV PrEP, deserves additional exploration as effectively.

“We want new, efficient STI prevention strategies and three research have now demonstrated that doxy-PEP considerably reduces gonorrhea, chlamydia and syphilis. Within the subsequent a number of years through the implementation of doxy-PEP, we have to find out about maximizing equitable entry and affect,” mentioned Dr. Connie Celum, Professor of International Well being and Medication on the College of Washington and co-principal investigator of the DoxyPEP Research.

Reference :

  1. Postexposure Doxycycline to Stop Bacterial Sexually Transmitted Infections – (

Supply: Medindia


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