STI Clinics: Unexpected Allies in the Fight Against HIV
"How STI clinics in Malawi are revolutionizing HIV screening and awareness"
For decades, the fight against HIV has been a global health priority, with the UNAIDS 90-90-90 targets setting ambitious goals for diagnosis, treatment, and viral suppression. Yet, in sub-Saharan Africa, the epicenter of the HIV epidemic, a significant number of people remain unaware of their HIV status. This gap underscores the urgent need for innovative strategies to reach high-risk populations and increase testing rates.
While many clinic and community-based strategies have been implemented to increase HIV diagnosis, many people have never been tested or do not test regularly. These individuals often belong to hard-to-reach populations at high risk for HIV infection. To address this challenge, a novel approach has emerged: leveraging the social networks of people attending clinics for sexually transmitted infections (STIs).
A groundbreaking study conducted in Lilongwe, Malawi, explored the acceptability and effectiveness of recruiting social contacts of STI patients for HIV screening. This research revealed that STI clinics could serve as critical hubs for expanding HIV awareness and testing, particularly among high-risk groups. By empowering patients to act as health promoters within their social networks, the study demonstrated a promising path toward achieving HIV testing goals.
A Connected Surveillance Picture
The CDC's STI Surveillance, 2024 (Provisional) reports the latest national data for the reportable STIs chlamydia, syphilis, and gonorrhea. WHO's HIV data and statistics resource tracks global and regional HIV estimates, antiretroviral therapy coverage, incidence among key populations, testing and care cascades, and progress toward international targets. In the United States and its territories, CDC-funded HIV testing, prevention, and client-level partner-services data cover jurisdictions in the United States, Puerto Rico, and the U.S. Virgin Islands. Together, these reporting systems show why STI clinics can contribute to HIV prevention, testing, and linkage-to-care efforts.
Screening Requires Accessible Testing
CDC clinical guidance provides resources for STI screening and treatment, while WHO's 2023 laboratory manual explains laboratory, point-of-care, diagnostic, and antimicrobial-susceptibility testing within STI control. The AMA's 2024 routine-screening toolkit emphasizes that HIV, STIs, viral hepatitis, and LTBI can have asymptomatic stages, which may keep people from seeking testing. A health-system review reports that structural, institutional, provider, and patient-level barriers have limited uptake of HIV and STI diagnostics in the United States. Standard methods therefore depend not only on technically appropriate tests but also on whether services are reachable and routinely offered.
From Stigma to Accessible Testing
HIV testing has progressed from complex and stigmatized laboratory procedures toward faster and more accessible diagnostics, including clinic-based and at-home options. The history reviewed by PMC describes measures intended to reduce fear of persecution and stigma, including anonymous HIV test sites and rapid testing in general-practitioner clinics. It also notes that HIV self-testing kits became available in January 2025 in the setting discussed by that review. This trajectory helps explain how STI clinics can serve as less intimidating entry points to HIV testing and prevention.
How Does Recruiting Social Contacts Work?
The study, conducted at the STI unit of Kamuzu Central Hospital in Lilongwe, Malawi, enrolled three groups of participants:
- HIV-infected patients with STIs
- HIV-uninfected patients with STIs
- Community controls
- Participants act as 'seeds' to recruit contacts.
- Coupons offer access to HIV and STI services.
- Focus on general health promotion.
Rethinking Screening Frequency and Access
A 2023 study notes that WHO recommends frequent STI screening for people using HIV pre-exposure prophylaxis, but found no evidence establishing the optimal frequency. A 2025 review identifies rapid, simple, inexpensive tests for symptomatic patients and asymptomatic screening, especially in women, as a global unmet need across income settings. The AMA toolkit stresses that effective routine screening requires deciding who should be screened, for which infections, and when. ACOG's July 2026 updated guidance recommends at least one HIV test for all patients and more frequent testing for people with risk factors.
The Missed Testing Opportunity
Evidence from a systematic review and meta-analysis identifies HIV testing among people who use STI services as a significant missed opportunity, particularly when an STI is diagnosed. The review concludes that stronger integration of HIV and STI services is urgently needed to improve prevention, early diagnosis, and linkage to care. A separate 2026 review reports that testing rates in the United States have declined substantially amid structural, institutional, provider, and patient-level barriers. These findings challenge the assumption that attending an STI service automatically leads to HIV testing.
Clinic, Home, and Network-Based Strategies
One comparison of HIV-testing strategies examined routine hospital-based testing in an emergency department, inpatient hospital, and clinics; modified partner services recruiting risk contacts; and respondent-driven recruitment of social contacts. A prospective Contraceptive CHOICE Project study compared completion and acceptability of home STI screening with clinic-based screening among its first 462 participants. Consumer-facing comparisons describe testing options ranging from free clinics and student health centers to doctors' offices, urgent care, and at-home kits. The evidence therefore frames testing as a choice among different access routes rather than a single universally superior setting.
The Power of Social Connection
The study's findings highlight the potential of leveraging social networks to expand HIV testing and awareness. By empowering STI patients to act as health promoters, clinics can reach individuals who may not otherwise seek testing. In a setting where HIV is endemic, integrating this approach into routine STI services could significantly contribute to achieving the goal of nearly all HIV-infected persons learning their status.
Why Integration Matters
STI clinics can plausibly function as HIV-prevention allies because they already encounter people seeking sexual-health services, including people who may have no symptoms. Their value depends on offering HIV testing and prevention alongside STI care rather than treating the services as separate encounters. The available evidence also suggests that integration must address stigma, access barriers, and linkage to care. These conclusions are best understood as a practical synthesis rather than as a single quantified finding.
Faster, More Personalised Prevention
A 2025 review describes emerging technologies that, if successfully developed, could make HIV and STI point-of-care testing rapid, accessible, personalised, and precise. A 2025 report highlights combined HIV/STI clinics, differentiated care models, and community-based delivery as approaches that may reduce stigma and expand access. It also identifies multipurpose prevention technologies designed to address HIV, STIs, and unintended pregnancy as an important frontier. Market projections separately point to growing adoption of advanced diagnostics, rapid testing solutions, and expanded screening programmes through 2035.
Integration Beyond the Clinic
Programs serving people who use HIV PrEP create opportunities to control bacterial STIs, but the review of STI control in the HIV-PrEP era also identifies challenges to doing so effectively. A 2026 scoping review describes integration of HIV, hepatitis B and C, and STI services as a potentially cost-effective approach that can improve health and system outcomes, while also requiring attention to implementation challenges. WHO reports that workforce constraints, gaps in diagnostics and commodities, and fragmented digital tools limit continuity and quality of integrated care. These system-level constraints can determine whether an integrated STI clinic delivers sustained HIV prevention or only a referral.
Care That Connects People
WHO's 2026 call for case studies seeks real-world examples of coordinated HIV, TB, hepatitis, and STI service delivery intended to improve access, efficiency, and patient outcomes. UNAIDS describes collaborative work across three districts that combined HIV prevention education, testing, PrEP screening, STI management, and referral to antiretroviral therapy services. These examples present integration as a practical coordination task involving services and communities, not merely a change in clinical protocol. For patients, the potential benefit is a more connected path from prevention and testing to treatment and ongoing care.