4-Infection Blood STI Panel
฿2,290
HIV, syphilis, hepatitis B and hepatitis C, assessed through six blood markers.
- Panel results
- 24 hours
Kauri Health Clinic · BTS Punnawithi
Syphilis: testing, treatment and what to know
Understand stages, antibody tests, RPR follow-up and treatment.
- Infection type
- Bacterial infection
- Relevant sample
- Blood testing
- Treatment outlook
- Curable with appropriate antibiotics
How is syphilis transmitted?
Syphilis spreads through direct contact with an infectious sore during vaginal, anal or oral sex. Sores can be hidden inside the mouth, vagina or rectum. It can also pass from a pregnant person to their baby. Condoms reduce risk but may not cover every affected area. Toilet seats, shared meals and ordinary social contact do not spread syphilis.
What are the symptoms and stages of syphilis?
A first sore commonly appears about 3 weeks after infection, but the range is 10–90 days. It is often painless and can go unnoticed. Secondary syphilis may cause a rash, including on the palms and soles, swollen glands, fever or patchy hair loss. Latent syphilis has no visible symptoms. Years later, untreated infection may damage the heart, brain or other organs; eye, ear and neurological involvement can occur at any stage.
How long does syphilis stay in the body?
Without effective treatment, syphilis can remain in the body for years or decades, even after a sore or rash heals. After successful treatment, treponemal antibody tests often stay positive for life. That is an immune-system record, not proof that treatment failed. RPR levels, symptoms and past results help assess response and possible reinfection. Previous syphilis does not protect you from getting it again.
Which tests diagnose syphilis: antibody, RPR or TPPA?
Diagnosis usually combines a treponemal test, such as syphilis antibody or TPPA, with a nontreponemal test such as RPR. The first detects an immune response to the organism; RPR helps assess activity and follow treatment. TPPA may clarify a result when other tests disagree—it is not automatically needed for everyone. Very early infection can test negative, so a recent exposure or suspicious sore may need repeat testing and examination.
How is syphilis treated?
Penicillin is the standard treatment. The formulation and course depend on the stage, previous treatment and whether the eyes, ears or nervous system are involved. Early disease and late or unknown-duration infection need different plans. Kauri provides medication for syphilis following physician assessment. Tell the doctor about pregnancy or penicillin allergy. New vision changes, hearing loss or neurological symptoms need urgent assessment rather than a routine screening appointment.
What happens after syphilis treatment?
Follow-up blood tests track the RPR titre over time; bring previous reports so the doctor can compare like with like. Partners may need testing and treatment even if they feel well. Avoid sexual contact until treatment is completed, sores have healed and your clinician confirms it is appropriate to resume. A short-lived fever or aches can occur after treatment begins; seek advice if you feel unwell. Severe allergic symptoms require emergency care.
Patient questions
Syphilis: common questions
Can I have syphilis without symptoms?
Yes. A sore may be hidden or painless, and latent syphilis has no symptoms. Testing is useful after a relevant exposure, a partner diagnosis or when recommended during routine sexual-health care.
Can a urine STI panel replace syphilis blood tests?
No. The 18-target urine panel lists Treponema pallidum, but a urine result does not replace standard syphilis blood testing, staging or RPR follow-up. For a syphilis concern, discuss the blood panel or appropriate individual blood tests.
Applicable individual blood tests
- Syphilis Antibody฿400
- RPR฿300
- TPPA (TPHA)฿600
Syphilis antibody and RPR are included in the four-infection blood panel. TPPA is a separate option when clinically useful, not an automatic extra test. The 18-target urine panel's Treponema pallidum target does not replace syphilis blood testing or RPR follow-up.
Panel turnaround starts after sample collection; it is not the time from exposure until infection becomes detectable. Individual-test timing and any additional clinical assessment are confirmed separately.
STI clinical references
Updated 17 October 2026. Educational information based on the clinical sources below; Kauri supplied the listed service availability and prices. Your assessment determines the tests and treatment appropriate for you.
Kauri Health Clinic · BTS Punnawithi
Plan a confidential visit at BTS Punnawithi
Kauri Health Clinic is at BTS Punnawithi, 3063 Sukhumvit Rd, Bang Chak, Phra Khanong, Bangkok 10260. Open Tuesday–Saturday, 9:00–18:00; closed Sunday and Monday. Tell us your concern, when any exposure happened and whether you have symptoms. Bring previous results and a list of medicines; the team will explain preparation and next steps privately.
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