Human Papillomavirus (HPV)

Human Papillomavirus (HPV) is a common sexually transmitted infection (STI) caused by a group of over 200 related viruses. Some HPV types cause benign warts, while others are high-risk types linked to cervical cancer and other anogenital cancers.

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Key Features of HPV:

1. Transmitted Through Skin-to-Skin Contact – Primarily spread through sexual contact, but also through direct skin exposure.
2. Divided Into Low-Risk & High-Risk Types:
   • Low-Risk HPV (e.g., HPV-6, HPV-11) → Causes genital warts, respiratory papillomatosis.
   • High-Risk HPV (e.g., HPV-16, HPV-18, HPV-31, HPV-45, etc.) → Can lead to cervical, anal, penile, vulvar, vaginal, and oropharyngeal cancers.
3. Most HPV Infections Are Asymptomatic & Clear Spontaneously – About 90% clear within 2 years without causing disease.
4. HPV Can Cause Different Conditions:
   • Cervical Cancer → 99% of cases are caused by HPV.
   • Genital Warts → Non-cancerous, caused by low-risk HPV types.
   • Other Cancers → HPV is linked to anal, throat, vulvar, vaginal, and penile cancers.

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HPV Testing & Diagnosis:

✅ HPV DNA Testing

• Detects high-risk HPV strains in cervical cells (via Pap smear).
• Used for screening cervical cancer risk in women.

✅ Pap Smear (Cytology Test)

• Examines cervical cells for precancerous changes (dysplasia).
• Abnormal Pap results may require HPV testing.

✅ Biopsy

• If abnormal growths are seen, a tissue sample is taken for diagnosis.

✅ Colposcopy

• A closer examination of the cervix, vagina, or vulva if HPV or abnormal Pap smear results are found.

✅ HPV Testing in Men

• Routine HPV testing is not recommended for men, but HPV can be detected in penile, anal, and throat samples if needed.

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HPV Vaccination (Prevention):

💉 HPV Vaccines (Gardasil 9, Cervarix) protect against high-risk HPV types (16, 18) and low-risk types (6, 11).

• Recommended for:
  • Girls & Boys (Ages 9–26) for best protection.
  • Adults (27–45) may benefit based on individual risk.
• Prevents over 90% of HPV-related cancers and genital warts.

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Key Takeaways:

✔ HPV is the most common STI and can cause warts or cancer.
✔ Most infections clear on their own, but high-risk HPV can lead to cancer.
✔ Routine screening (Pap smears, HPV DNA tests) is crucial for early detection.
✔ Vaccination is the best prevention against high-risk HPV types.