Early diagnosis key to combating syphilis surge in Brazil, experts warn

Syphilis caused 196 deaths in 2023, with 25,000 congenital cases resulting in miscarriages, premature births, low birth weight, severe sequelae, and infant mortality.
The sore vanishes on its own. Patients assume they have recovered. They have not.
How syphilis deceives patients in its earliest stage, allowing the infection to progress undetected.

Em meio a uma crise silenciosa de saúde pública, o Brasil registrou quase 243 mil casos de sífilis em 2023, com 25 mil bebês nascidos com a forma congênita da doença e 196 mortes evitáveis. No Dia Nacional de Combate à Sífilis, especialistas reafirmam uma verdade que o tempo não apaga: a detecção precoce e o tratamento com antibióticos são as únicas barreiras confiáveis entre a propagação e a prevenção. A tragédia não reside na falta de conhecimento ou de recursos, mas na distância entre o que se sabe e o que se pratica.

  • Com 86 mil gestantes infectadas e 196 mortes de bebês em um único ano, a sífilis congênita no Brasil não é uma ameaça abstrata — é uma emergência que se repete silenciosamente a cada pré-natal negligenciado.
  • A doença engana: a ferida inicial desaparece sozinha, levando pacientes a acreditarem que estão curados, enquanto a infecção avança para estágios mais graves e sistêmicos.
  • Especialistas alertam que antibióticos funcionam e a cura é possível, mas o tempo é determinante — cada semana sem diagnóstico é uma janela de transmissão que permanece aberta.
  • O protocolo existe — triagem no primeiro e no terceiro trimestres, testes rápidos, rastreamento de parceiros — mas sua aplicação inconsistente é exatamente onde a epidemia encontra espaço para crescer.
  • O país possui o conhecimento, os medicamentos e a capacidade diagnóstica; o que falta é a garantia de que cada gestante será testada e cada resultado positivo receberá resposta imediata.

O Brasil enfrenta uma crise de sífilis que remodelou silenciosamente o cenário da saúde pública. Em 2023, foram registrados quase 243 mil casos de sífilis adquirida, 86,1 mil deles em gestantes. O dado mais perturbador: 25 mil bebês nasceram com sífilis congênita, e 196 não sobreviveram — mortes que poderiam ter sido evitadas.

No Dia Nacional de Combate à Sífilis, celebrado em 18 de outubro, especialistas voltaram a destacar o que já se sabe, mas ainda não se pratica com consistência: o diagnóstico precoce e o tratamento imediato são as ferramentas mais eficazes disponíveis. Marcelo Cordeiro, infectologista e consultor do Sabin Diagnóstico e Saúde, explica que a sífilis progride em estágios, cada um oferecendo uma janela de intervenção. O primeiro sinal é uma ferida indolor — o cancro — que pode desaparecer espontaneamente, criando uma falsa sensação de cura. A infecção, porém, permanece ativa e avança para fases secundárias com febre, erupções cutâneas e comprometimento sistêmico.

Para gestantes, o risco é ainda mais grave. A sífilis transmitida ao feto pode causar aborto, parto prematuro, baixo peso ao nascer, danos neurológicos severos ou morte fetal. Tudo isso é evitável com triagem no primeiro e no terceiro trimestres e tratamento imediato após resultado positivo.

O verdadeiro problema não é a falta de conhecimento nem de recursos. O Brasil tem os medicamentos, os testes e os protocolos. O que falta é a garantia de que cada gestante será testada, cada diagnóstico positivo será tratado sem demora e cada parceiro sexual será rastreado. É nessa lacuna entre o saber e o fazer que a doença continua a prosperar, geração após geração.

Brazil is in the grip of a syphilis crisis that has quietly reshaped the landscape of public health. The numbers are stark: in 2023 alone, the country documented nearly 243,000 cases of acquired syphilis. Among pregnant women, the toll was 86,100 infections. And the most devastating figure—25,000 babies born with congenital syphilis, a preventable tragedy that claimed 196 lives that year.

As the country marked its National Day Against Syphilis and Congenital Syphilis on October 18th, health professionals seized the moment to sound an alarm that has been building for years: early detection and swift treatment remain the most powerful tools available to stop the disease's spread. The message is not new, but the urgency behind it has sharpened.

Marcelo Cordeiro, an infectious disease specialist and consultant with Sabin Diagnóstico e Saúde, walks through the disease's progression with the precision of someone who has seen its consequences firsthand. Syphilis moves through the body in stages, each one offering a window of opportunity for intervention. In its earliest phase, the telltale sign is a painless sore—medical terminology calls it a chancre—that appears on the genitals, anus, or mouth. Here is where the disease's deception becomes apparent: the sore often vanishes on its own, even without treatment. Patients, relieved, assume they have recovered. They have not. The infection remains, dormant and dangerous, ready to advance.

Left unchecked, syphilis progresses into secondary stages marked by fever, skin rashes, sore throat, and swollen lymph nodes. The disease becomes systemic, harder to ignore, but also more entrenched. Yet Cordeiro emphasizes a crucial fact: syphilis remains curable. Antibiotics work. The catch is timing. The earlier a diagnosis arrives, the more effective the treatment, and the lower the risk that an infected person will transmit the disease to others.

For pregnant women, the stakes climb sharply. When syphilis crosses from mother to fetus during pregnancy, it becomes congenital syphilis—a condition that can trigger miscarriage, premature labor, dangerously low birth weight, severe neurological and developmental damage, or fetal death. The cascade of harm is preventable, but only if the infection is caught and treated before it reaches the child.

Cordeiro outlines the screening protocol that should become routine: testing in the first trimester, then again in the third. The tools exist—rapid tests that deliver results quickly, and laboratory analyses that detect antibodies the body produces in response to the bacterial infection. In specific cases, doctors can even extract cerebrospinal fluid for analysis, a more invasive but sometimes necessary step.

The gap between what is known and what is done remains the real problem. Brazil has the knowledge, the medications, the diagnostic capacity. What it lacks is the consistency of implementation—the guarantee that every pregnant woman will be tested, that every positive result will trigger immediate treatment, that every sexual partner will be traced and treated. The disease thrives in that gap, moving from person to person, generation to generation, preventable but persistent.

The sore may disappear on its own, but this does not mean the disease is cured.
— Marcelo Cordeiro, infectious disease specialist
Syphilis is curable when identified early. Antibiotic treatment is effective, and the sooner diagnosis occurs, the better the outcome and the lower the risk of transmission.
— Marcelo Cordeiro, infectious disease specialist
La Conversación del Hearth Otra perspectiva de la historia
Inventor

Why does syphilis keep spreading in a country with the resources to stop it?

Model

Because knowing how to treat something and actually reaching everyone who needs treatment are two different problems. A woman might get tested once during pregnancy, but if her partner isn't treated, she gets reinfected. Or she might live in a place where antibiotics are hard to access.

Inventor

The early symptoms sound easy to miss—a painless sore that disappears on its own?

Model

That's exactly the trap. Someone notices a sore, it goes away in a few weeks, and they think they're fine. Meanwhile the bacteria is spreading through their body. By the time symptoms return—fever, rashes—the disease has had months to take hold.

Inventor

What makes congenital syphilis so different from the adult version?

Model

The baby has no immune system yet. The infection doesn't just sicken the child—it can destroy development in the womb. Miscarriage, premature birth, permanent neurological damage. It's entirely preventable with a single course of antibiotics during pregnancy, but only if the mother knows she's infected.

Inventor

So the solution is just better prenatal screening?

Model

Screening is the foundation, yes. But screening alone doesn't work if the results don't lead to treatment, or if the treatment doesn't reach both partners. You need the whole chain to hold.

Inventor

What does 196 deaths in a single year actually represent?

Model

It represents 196 babies who didn't have to die. Each one is a failure of a system that had every tool needed to prevent that death.

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