Who Should Get Tested for Syphilis? 7 At-Risk Groups That Need Regular Checkups

Syphilis—a sexually transmitted infection that many assume is a disease of the past—is making a strong comeback globally. In many countries, including Thailand, it’s especially prevalent among teenagers, men who have sex with men (MSM), and those engaging in unprotected sex. Regular testing is key to protecting oneself and others.

What is Syphilis?

Syphilis is caused by the bacterium Treponema pallidum. It is primarily transmitted through vaginal, anal, or oral sex without protection. Left untreated, it can lead to severe complications involving the brain, heart, and nervous system—even years after initial infection.

Why Regular Testing Matters

The early stages of syphilis may have no visible symptoms, allowing the infection to spread silently. Regular testing enables early detection and treatment—usually with a simple course of antibiotics—and prevents further transmission.

7 At-Risk Groups Who Should Get Tested

• People with multiple sexual partners
  The more partners you have, the higher the risk—especially if you don’t consistently use condoms.
• Those who engage in unprotected sex
  Even monogamous relationships are not risk-free if neither partner has ever been tested.
• LGBTQI+ individuals, especially MSM and transgender women
  Statistics show higher rates of syphilis in these communities due to structural barriers and stigma.
• People living with HIV or at high risk of HIV
  Syphilis increases susceptibility to HIV and vice versa. Dual infections are common.
• Pregnant women or those planning to become pregnant
  Untreated syphilis can be transmitted to the fetus, causing miscarriage or congenital syphilis.
• Youth aged 15–24
  This age group often begins exploring their sexuality but may lack access to regular testing and information.
• Anyone with a history of STIs
  Having one STI increases the likelihood of acquiring another, including syphilis.

How Often Should You Test?

If you’re in a high-risk group, testing every 3 to 6 months is advisable. At minimum, get tested once a year. Early detection equals early intervention.

Where Can You Get Tested?

• Sexual health clinics and mobile units
• Anonymous clinics supported by public health authorities
• LGBTQI+ community centers like Mplus or Nam Kwan Sii Rung
• Government hospitals and STI-focused health services

Final Thoughts

Getting tested for syphilis is not just about protecting yourself—it's a step toward building a healthier, stigma-free community. If you belong to any of the seven at-risk groups, make testing a regular part of your healthcare routine. Knowing your status is an act of care—for yourself and others.