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Rising syphilis infections across the Americas

Updated 13 times since CLSTR started tracking revisions of this situation.

What changed

2026-10-06 14:20 UTC → 2026-10-07 15:21 UTC · added removed

Syphilis infections are rising significantly across the Americas, with Latin America and the Caribbean accounting for 90% of new infections in the region. Data from the AIDS 2026 conference indicates that in 2024, there were approximately 4.2 million new infections, a 15% increase from 2022. In Chile, cases reached a historic peak in 2025 with 11,155 notifications, a rate of 55.2 per 100,000 inhabitants. This represents a 2.4-fold increase compared to a decade ago. While the highest concentration of cases remains among adults aged 20 to 39, the infection rate for women over 60 doubled between 2021 and 2025. In the Aysén region, the notification rate reached 90.1 per 100,000 inhabitants, an 8.8-fold increase since 2021. Argentina continues to report high levels of infection. In 2025, Argentina, the country saw a record high of 46,799 notified cases, cases in 2025, a rate of 117.2 per 100,000 inhabitants. Recent analysis indicates that syphilis cases in Argentina quadrupled between 2021 and 2025, with 76% of those infected falling within the 15 to 39 age range, specifically concentrated among those aged 20 to 29. Experts attribute this surge to “low risk perception, insufficient implementation of comprehensive sexual education, and misconceptions regarding contraceptive effectiveness.” range. In response to these trends, legislative action is being taken in Argentina. In the surge, province of Entre Ríos, a bill has been submitted to the Municipality Chamber of Olavarría, Deputies to establish a comprehensive program for the prevention, early detection, and treatment of syphilis. This follows a reported 72% increase in coordination cases in the province, with 811 notifications recorded during the Buenos Aires Provincial Ministry first 44 weeks of Health, has opened two new rapid testing centers for HIV and syphilis at Primary Health Care Centers No. 5 and No. 7. These facilities aim 2025 compared to provide free, confidential diagnoses 467 during the same period in 2024. The proposed program aims to utilize the provincial health network, specifically primary care centers, to improve patient follow-up and offer Post-Exposure Prophylaxis (PEP) within 72 hours of unprotected contact. prevent congenital syphilis. In Costa Rica, the Ministry of Health reported 2,591 cases during the first 35 weeks of 2026, a 20.96% increase over the same period in 2025.

Versions

  1. 2026-10-07 15:21 UTC Rising syphilis infections across the Americas
  2. 2026-10-06 14:20 UTC Rising syphilis infections across the Americas
  3. 2026-10-04 22:29 UTC Rising syphilis infections across the Americas
  4. 2026-09-25 19:11 UTC Rising syphilis infections across the Americas
  5. 2026-09-20 14:13 UTC Rising syphilis infections across the Americas
  6. 2026-09-09 04:04 UTC Rising syphilis infections across the Americas
  7. 2026-09-07 04:45 UTC Rising syphilis infections across the Americas
  8. 2026-09-02 18:10 UTC Rising syphilis infections across the Americas
  9. 2026-08-29 03:45 UTC Rising syphilis infections across the Americas
  10. 2026-08-28 00:19 UTC Rising syphilis infections across the Americas
  11. 2026-08-27 16:04 UTC Rising syphilis infections across the Americas
  12. 2026-08-25 14:01 UTC Rising syphilis infections across the Americas
  13. 2026-08-23 03:16 UTC Syphilis surge in the Americas and Chile
  14. 2026-08-18 17:19 UTC Syphilis surge in the Americas

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