STI Prevention Strategies: Comprehensive Clinical and Public-Health Guide

Post focus: STI prevention strategies — sexual-health education, condoms and lubricants, testing and screening, vaccines, partner services, HIV PrEP/PEP, antenatal prevention, blood/injection safety, clinical prevention and public-health systems.

Learning objectives

• Describe primary, secondary and tertiary STI prevention and explain why combination prevention works.
• Demonstrate correct condom/lubricant use and communicate risk without stigma.
• Plan screening, vaccination, partner services, HIV PrEP/PEP and antenatal interventions.
• Prevent mother-to-child, blood-borne and healthcare-associated transmission.
• Design a clinic and community prevention programme and monitor its quality.

1. What prevention is trying to achieve

STIs spread through sexual contact, mucosal/skin contact, blood exposure and perinatal transmission. Some are curable (chlamydia, gonorrhoea, syphilis, trichomoniasis); others are controllable but not eradicated by current treatment (HSV, HIV, HPV, chronic hepatitis B/C). Prevention therefore aims to stop acquisition, detect infection before complications, prevent onward transmission and reduce disability/cancer.

2. Individual combination-prevention plan

1. Ask what matters to the patient—pleasure, pregnancy prevention, fertility, privacy, cost and relationship safety.
2. Assess partners, practices and exposed sites; risk is anatomical and behavioural, not determined by identity or appearance.
3. Offer the smallest practical package the patient can accept today: condoms/lubricant, testing, vaccination, PrEP/PEP and treatment/referral.
4. Agree on a follow-up date and safety-net instructions; use teach-back to verify understanding.

3. Condoms and lubricants

3.1 Benefits and limitations

External and internal condoms, when used correctly and consistently, reduce HIV and many bacterial/viral STIs and prevent pregnancy. They are less protective against infections spread by uncovered skin or lesions (HSV, HPV and syphilis). PrEP protects against HIV, not other STIs or pregnancy, so condoms and lubricant remain valuable.

3.2 External-condom technique

1. Check expiry, package integrity and approved quality mark; open at the edge without teeth or sharp nails.
2. Before genital contact, identify the correct side, pinch the reservoir, place on the erect penis and roll to the base.
3. Use adequate compatible lubricant; water- or silicone-based lubricant is safe with latex. Avoid oil, petroleum jelly, body lotion and cooking oils with latex.
4. After ejaculation, hold the base while withdrawing; tie/wrap and discard in a bin—never flush or reuse.
5. Use a new condom for every act and every anatomical site (vaginal, anal, oral); do not double-condom because friction increases breakage.

3.3 Internal condom and dental dam

Internal condoms can be inserted before sex and provide a nitrile barrier; do not use an internal and external condom together. A dental dam or cut-open condom can cover the vulva/anus for oral sex. Teach practice with models and address negotiating safety.

4. Safer sexual practices and communication

• Abstinence or delaying sex is an effective option only when voluntary and supported—not a reason to shame someone who is sexually active.
• Mutual monogamy with a tested, uninfected partner reduces risk; discuss what “exclusive” means and repeat testing after new exposures.
• Reduce concurrent partners, avoid sex during active ulcers/discharge and seek testing before new sexual relationships.
• Do not share sex toys without cleaning and a new condom between users; avoid sex when intoxication prevents consent or condom negotiation.
• Discuss consent, power, gender-based violence and safe referral. A patient at risk of violence may need discreet supplies and a confidential safety plan.

5. Vaccination

6. Testing and screening

• Offer confidential, voluntary HIV and syphilis testing to people with an STI; add gonorrhoea/chlamydia/trichomonas tests based on symptoms, age, pregnancy, practices and local policy.
• Test each exposed site: first-catch urine/genital swab, rectal swab after receptive anal sex and pharyngeal swab after oral exposure when indicated.
• Screen pregnant patients early for syphilis, HIV and hepatitis B; repeat according to Uganda antenatal guidance and treat immediately.
• Screen for cervical precancer using the locally available HPV/DNA, visual inspection or cytology pathway; treat precancer promptly.
• Repeat chlamydia/gonorrhoea/trichomoniasis testing about three months after treatment because reinfection is common; test sooner for symptoms or re-exposure.
• Use window-period counselling: a negative test soon after exposure may need repetition. Obtain consent and protect confidentiality.

7. HIV prevention: PrEP, PEP and treatment as prevention

7.1 PrEP

PrEP is antiretroviral medication taken before potential HIV exposure by people with ongoing risk. Assess HIV status, renal function, hepatitis B, pregnancy and adherence; provide condoms and STI testing because PrEP does not prevent other STIs. Use the current Ugandan regimen and delivery model (daily oral or nationally approved long-acting options).

7.2 PEP

PEP is an emergency antiretroviral course after a significant exposure. Start as soon as possible—ideally within 24 hours and no later than 72 hours—after sexual assault, condom break, occupational exposure or other substantial risk. Perform baseline HIV testing, pregnancy assessment and hepatitis evaluation without delaying the first dose; provide a complete 28-day regimen and follow-up according to national HIV guidelines.

7.3 Treatment as prevention

Rapid linkage to ART, adherence support and sustained viral suppression prevent sexual HIV transmission. Do not withhold condoms or STI care because someone is on ART.

8. Partner services and outbreak control

1. Explain the purpose: protect partners, prevent reinfection and reduce complications—not punish anyone.
2. Offer patient referral, provider referral, dual referral or lawful expedited partner therapy. Choose the safest method when violence or coercion is possible.
3. Partners receive pathogen-specific testing/treatment, HIV/syphilis testing, vaccination and prevention counselling.
4. Use confidential records, contact tracing and public-health notification for conditions required by Uganda policy.
5. Investigate clusters, resistant gonorrhoea and congenital syphilis as sentinel events for service improvement.

9. Antenatal, perinatal and neonatal prevention

• Offer early antenatal HIV, syphilis and hepatitis B testing; repeat later if ongoing risk. Treat maternal syphilis promptly with penicillin and document partner management.
• Link pregnant patients with HIV to ART/PMTCT services; plan delivery, neonatal prophylaxis and infant testing under national protocol.
• Prevent neonatal gonococcal/chlamydial disease through antenatal screening and maternal treatment; urgent neonatal conjunctivitis needs systemic paediatric therapy, not drops alone.
• For recurrent genital herpes near delivery, involve obstetrics; active lesions/prodrome at labour require a national obstetric plan.
• Provide hepatitis B birth-dose vaccination and immunoprophylaxis for exposed infants according to Uganda policy.

10. Blood, injection and healthcare safety

• Screen donated blood for HIV, hepatitis B/C and syphilis using validated quality systems.
• Use sterile, single-use needles and equipment; provide harm-reduction and linkage services for people who inject drugs where available.
• Apply standard precautions, safe sharps disposal and post-exposure protocols for healthcare workers.
• Never share razors, needles, tattoo/piercing equipment or instruments that may carry blood; ensure sterilisation.

11. Antimicrobial stewardship and emerging tools

• Use current national regimens, correct dose/duration and direct observation where appropriate; avoid incomplete courses and antibiotics for viral/non-infectious disease.
• Obtain gonococcal culture/AST for treatment failure, pharyngeal infection and surveillance to detect emerging resistance.
• Doxycycline post-exposure prophylaxis is not a universal self-medication strategy. Current evidence supports clinician-guided use only for selected populations at high risk in settings with a programme, monitoring and resistance safeguards; it does not prevent HIV, HPV, herpes or pregnancy.
• Do not use routine antibiotic prophylaxis in pregnancy or children without specialist/national guidance.

12. Community, school and health-system interventions

• Comprehensive, age-appropriate sexuality education: consent, anatomy, condoms, testing, vaccination, online safety and service navigation.
• Adolescent-friendly and key-population-friendly clinics with confidentiality, convenient hours, peer navigators and non-discrimination.
• Integrate STI/HIV, family planning, antenatal, hepatitis, cervical-cancer and gender-based-violence services.
• Maintain reliable condom/lubricant, test-kit, vaccine and essential-medicine supply chains.
• Train providers in sexual history, trauma-informed examination, partner services, antimicrobial stewardship and cultural humility.
• Monitor coverage, positivity, treatment completion, partner notification, congenital syphilis, resistance and patient experience.

13. What does not prevent STIs?

• Washing, urinating, douching or using antiseptics after sex does not reliably prevent infection and can cause irritation.
• Oral contraceptives, emergency contraception and withdrawal prevent pregnancy but not STIs.
• PrEP prevents HIV, not gonorrhoea, chlamydia, syphilis, HPV, herpes or pregnancy.
• Symptoms are not a reliable screen: many infections are asymptomatic; testing and partner care are essential.
• Taking a partner’s antibiotics or repeated “shot” treatment without testing can cause adverse effects and resistance.

14. Clinical prevention checklist

15. Worked cases

Case 1: condom break 24 hours ago

Provide compassionate risk assessment, urgent HIV PEP evaluation (within 72 hours), pregnancy/contraception counselling, STI and hepatitis testing, emergency contraception where appropriate, condoms and follow-up. Do not wait for symptoms.

Case 2: adolescent requesting condoms privately

Confirm confidentiality limits and safeguarding, provide age-appropriate education, condoms/lubricant, testing/vaccination referral and a voluntary prevention plan. Do not use shame or require a partner’s permission when the patient has capacity under local law.

Case 3: pregnant patient with positive syphilis test

Stage clinically, give penicillin urgently according to national regimen, assess allergy/desensitisation, notify/treat partner, test HIV and other infections, plan fetal/newborn follow-up and document every dose.

16. Quick self-test

1. Name the three levels of prevention.
2. Which lubricant should not be used with latex condoms?
3. What is the latest time PEP should usually be started after a substantial HIV exposure?
4. Why does PrEP not replace condoms?
5. List three services that should be integrated with STI prevention.

Further study and source material

• Slideshare: Sexually transmitted infections—prevention.
• WHO STI prevention strategies.
• WHO condoms and lubricants.
• WHO HIV post-exposure prophylaxis guidance.
• Uganda National Comprehensive Condom Programming Strategy.
• Uganda hepatitis B/C prevention guidelines.

Take-home: The strongest STI prevention package combines condoms and lubricant, vaccination, regular site-specific testing, prompt treatment and partner services, HIV PrEP/PEP and ART, antenatal prevention, blood/injection safety, and stigma-free education.