STDs and When to Consider PrEP for HIV in South Africa: Your Online Guide

Managing sexual health effectively requires open communication, routine diagnostic screening, prompt treatment for Sexually Transmitted Diseases (STDs / STIs), and taking advantage of modern preventive therapies like PrEP (Pre-Exposure Prophylaxis) for HIV prevention. Accessible online consultations allow South Africans to receive confidential clinical guidance, prescription refills, and laboratory referrals from the comfort of home.

Major Sexually Transmitted Diseases and Medical Interventions

1. Chlamydia

• Etiology: Bacterial infection caused by Chlamydia trachomatis.
• Clinical Symptoms: Frequently asymptomatic; may present with unusual dysuria (burning during urination), mucopurulent discharge, or lower abdominal/pelvic discomfort.
• Medical Treatment: Targeted antibiotic therapy (typically oral Doxycycline for 7 days or single-dose Azithromycin under clinical direction).
• Clinical Protocol: Both sexual partners must be treated simultaneously, refraining from sexual contact for 7 days post-treatment to prevent reinfection.

2. Gonorrhoea

• Etiology: Bacterial infection caused by Neisseria gonorrhoeae.
• Clinical Symptoms: Purulent urethral or vaginal discharge, severe dysuria, and pelvic pain. Co-infection with Chlamydia is common.
• Medical Treatment: Intramuscular Ceftriaxone injection combined with oral Doxycycline to cover potential co-infections and manage antibiotic resistance risks.

3. Syphilis

• Etiology: Spirochetal bacterial infection caused by Treponema pallidum.
• Clinical Stages:
  • Primary: Single, painless firm ulcer (chancre) at the site of inoculation.
  • Secondary: Non-pruritic skin rash (frequently involving palms and soles), mucous patches, and lymphadenopathy.
  • Tertiary / Latent: Severe cardiovascular, ocular, and neurosyphilis complications if untreated.
• Medical Treatment: Injectable Benzathine Penicillin G (or oral Doxycycline alternatives for penicillin-allergic individuals).

4. Genital Herpes (HSV-1 & HSV-2)

• Etiology: Herpes Simplex Virus.
• Clinical Symptoms: Painful vesicular lesions or ulcers on an erythematous base, accompanied by local tingling or systemic flu-like symptoms during initial outbreaks.
• Medical Management: Oral antiviral therapy (e.g., Acyclovir or Valacyclovir) reduces acute outbreak duration, while daily suppressive therapy significantly reduces viral shedding and recurrent outbreaks.

5. Human Papillomavirus (HPV)

• Etiology: Viral infection with over 100 strains.
• Clinical Impact: Low-risk strains cause anogenital warts (condylomata acuminata); high-risk oncogenic strains (such as HPV 16 and 18) drive cervical, anal, and oropharyngeal dysplasia and malignancies.
• Management & Prevention: Topical medical applications or cryotherapy for visible warts; routine Pap smears for cervical screening. The Gardasil 9 HPV vaccine offers robust primary protection and is recommended for individuals up to age 45.

6. Human Immunodeficiency Virus (HIV)

• Etiology: Retrovirus targeting CD4+ T-lymphocytes.
• Clinical Management: Lifelong Antiretroviral Therapy (ART) suppresses viral replication, maintaining immune function and overall quality of life.
• U=U Principle (Undetectable = Untransmittable): Achieving and maintaining an undetectable viral load via ART completely eliminates the risk of sexually transmitting HIV to partners.
• Prevention Options: Consistent barrier methods, PrEP (Pre-Exposure Prophylaxis) prior to exposure, and PEP (Post-Exposure Prophylaxis) within 72 hours of potential exposure.

7. Trichomoniasis

• Etiology: Parasitic infection caused by Trichomonas vaginalis.
• Clinical Symptoms: Diffuse, frothy, malodorous vaginal discharge, vulvar erythema, and dysuria in women; often asymptomatic in men.
• Medical Treatment: Single-dose or multi-day oral Metronidazole or Tinidazole for both partners.

8. Viral Hepatitis B (HBV) and Hepatitis C (HCV)

• Transmission: Direct exposure to infectious blood or bodily fluids (sexual transmission is particularly high for HBV).
• Medical Management: Chronic HBV is managed long-term with daily antiviral medications (e.g., Tenofovir); chronic HCV is curable utilizing modern direct-acting antiviral (DAA) treatment regimens. Hepatitis B is preventable via routine vaccination.

PrEP (Pre-Exposure Prophylaxis) for HIV Prevention

What Is PrEP?

PrEP is an evidence-based biomedical HIV prevention intervention involving daily or event-driven oral antiretroviral medication (such as Tenofovir disoproxil fumarate / Emtricitabine). When taken consistently as prescribed:

• Reduces the risk of acquiring HIV through sexual contact by approximately 99%.
• Reduces the risk among individuals who inject drugs by over 74%.

Who Should Consider Starting PrEP?

PrEP is recommended for HIV-negative individuals who experience increased exposure risks, including those who:

• Are in a serodiscordant relationship where the HIV-positive partner is not yet virally suppressed on ART.
• Have multiple or casual sexual partners with inconsistent condom usage.
• Have been recently diagnosed with a bacterial STI (such as syphilis or gonorrhoea).
• Are sex workers or commercial venue workers seeking proactive personal health protection.

Required Baseline and Ongoing PrEP Clinical Monitoring

To maintain safety and prescription efficacy, individuals taking PrEP adhere to a simple monitoring protocol:

• Baseline & Quarterly HIV Testing: Confirming HIV-negative status prior to initiating and every 3 months during therapy.
• STI Screening: Comprehensive STI screening every 3 to 6 months.
• Renal Function Screening: Serum creatinine and eGFR testing at baseline and every 6 months.

Summary: Sexually Transmitted Infections at a Glance