Argentina is facing a concerning rise in syphilis cases, reporting its highest numbers in five years with 55,183 confirmed diagnoses in 2025. The increase underscores a growing public health challenge both within the country and globally,as the sexually transmitted infection can have serious long-term consequences if left untreated. Health officials are now working to expand access to testing and treatment, while also addressing potential contributing factors to the surge in cases. This report details the current situation, symptoms, testing options, and prevention strategies related to the recent increase in syphilis diagnoses.
Argentina reported its highest number of syphilis diagnoses in five years in 2025, with 55,183 confirmed cases, according to data from the national epidemiological bulletin. This increase signals a growing public health concern, as syphilis, while curable, can have serious long-term consequences if left untreated.
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The rise in cases isn’t unique to Argentina; syphilis remains a common sexually transmitted infection (STI) globally. Health officials emphasize the importance of early detection and treatment to prevent complications.
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There has been some variation in reported numbers, with some sources citing 46,613 confirmed cases within a larger total of notifications. These discrepancies often stem from differences in how data is reported – distinguishing between initial notifications and confirmed diagnoses – and the timing of data validation within surveillance systems. Regardless of the exact figure, the overall trend indicates an increase in diagnoses.
Health authorities are focusing not only on reporting cases but also on ensuring people get tested promptly and complete their treatment. This is a critical step in controlling the spread of the infection.
What is Syphilis and Why is it a Concern?
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Syphilis is an STI caused by the bacterium Treponema pallidum. It is primarily transmitted through sexual contact – vaginal, anal, or oral – when sores are present. It can also be passed from a mother to her baby during pregnancy, resulting in congenital syphilis.
The concern stems from the fact that syphilis can be highly contagious in its early stages, yet often presents with subtle or easily overlooked symptoms. A sore may be painless, disappear on its own, and create a false sense of security while the infection continues to progress.
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International health organizations emphasize that prenatal care and access to early diagnosis and treatment for pregnant women are crucial to reducing the risk of transmission to the baby, particularly given the observed increases in diagnoses among this population.
Symptoms: Why Many People Don’t Detect it in Time
Syphilis can progress through stages, and sometimes doesn’t cause any symptoms at all. When symptoms do appear, they can vary and be mistaken for other conditions.
In the primary syphilis stage, the classic sign is a chancre: a generally painless ulcer at the site of infection (genitals, anus, or mouth). It typically appears between 9 and 90 days after infection and can easily go unnoticed.
In the secondary stage, symptoms can include skin rashes (including on the palms of the hands and soles of the feet), fever, general malaise, and swollen lymph nodes. The rash may not itch, which can also delay seeking medical attention.
The infection can then enter a latent stage, with no symptoms, but the bacteria remain present. If left untreated, the infection can progress to later stages, affecting organs, the nervous system, or the cardiovascular system.
What Tests are Available for Early Detection?
Diagnosis is confirmed through laboratory tests and clinical evaluation. Two main types of tests are used: nontreponemal tests (such as VDRL or RPR, also used for monitoring treatment) and treponemal tests (which detect specific antibodies). Rapid screening tests are also available, providing results in minutes in community or primary care settings.
The Pan American Health Organization (PAHO) highlights that rapid tests can expand access to screening, and that screening and timely treatment during pregnancy are critical for preventing mother-to-child transmission.
Who should consider getting tested more frequently? Recommendations vary based on medical history and risk factors, but health organizations particularly emphasize testing for sexually active individuals with new partners, those with a previous STI, and pregnant women during prenatal care.
Importantly, having syphilis does not provide immunity, meaning reinfection is possible. Community-based organizations have observed this phenomenon in men through surveys and field reports.
Treatment: Why Medical Consultation is Essential
Syphilis is treated with antibiotics, and according to international organizations, penicillin remains the recommended treatment in many clinical situations, including pregnancy, where specific guidelines and follow-up are necessary.
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Experts stress that simply “taking something” is not enough. Proper diagnosis, completion of the full treatment course, and follow-up testing are essential to monitor the response and prevent retransmission to sexual partners.
Prevention: A Return to a Classic Message (with Nuances)
The increase in cases has prompted renewed prevention campaigns emphasizing condom use and testing. PAHO reminds us that consistent and correct condom use significantly reduces risk, although it may not cover lesions located outside the protected area.
Infectious disease specialists have also noted a shift in behaviors: some individuals rely on HIV prevention strategies (such as PrEP) and reduce their use of barrier methods, despite the fact that PrEP does not prevent other STIs like syphilis—a point recently reiterated by specialists.
With diagnoses on the rise, the challenge is twofold: maintaining access to testing and treatment, and updating prevention messaging to encourage it to become a regular practice, not an occasional reminder.
LV CP
