Syphilis
MONDO:0005976A contagious bacterial infection caused by the spirochete Treponema pallidum. It is a sexually transmitted disorder, although it can also be transmitted from the mother to the fetus in utero. Typically, it is initially manifested with a single sore which heals without treatment. If the infection is left untreated, the initial stage is followed by skin rash and mucous membrane lesions. A late stage follows, which is characterized by damage of the internal organs, including the nervous system.
Also known as: Treponema pallidum caused disease or disorder, Treponema pallidum disease or disorder, Treponema pallidum infectious disease
65 clinical trials for this condition and its sub-types, 47 tagged with Syphilis itself.
Follow this condition to get notified about new trialsWhere it sits in the disease tree
Browse by category →Sub-types of Syphilis
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Congenital syphilis 7 trials
2 sub-types
- Early congenital syphilis 0 trials
- Late congenital syphilis 0 trials
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Primary syphilis 7 trials
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Yaws 3 trials · 4 incl. sub-types
4 sub-types
- Early yaws 1 trial
- Late yaws 0 trials
- Latent yaws 0 trials
- Tertiary lesion of yaws 0 trials
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Latent syphilis 1 trial · 2 incl. sub-types
2 sub-types
- Latent early syphilis 2 trials
- Late latent syphilis 0 trials
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Tertiary syphilis 0 trials · 2 incl. sub-types
4 sub-types
- Neurosyphilis 0 trials · 2 incl. sub-types Sub-types →
- Cardiovascular syphilis 0 trials
- Gummatous syphilis 0 trials
- Late latent syphilis 0 trials
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Secondary syphilis 1 trial
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Bejel 0 trials
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Chancre 0 trials
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Cutaneous syphilis 0 trials
1 sub-type
- Late yaws 0 trials
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Syphilitic aortitis 0 trials
Most studied deeper sub-types
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Could a simple pill replace the shot for syphilis?
Cure CompletedThis study tested whether a 14-day course of doxycycline pills works as well as the standard penicillin shot for curing early syphilis. About 200 adults with early-stage syphilis took part. The goal is to offer a reliable oral option, especially when penicillin is in short supply…
Phase 3 • Sponsor: Assistance Publique - Hôpitaux de Paris • Aim: Cure
Last updated Jun 27, 2026 07:58 UTC
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Could a pill replace the syphilis shot? new trial tests oral antibiotic
Disease control CompletedThis trial compares an oral antibiotic called linezolid to the standard penicillin injection for treating early syphilis. Linezolid can reach the brain, which may help prevent neurosyphilis. About 224 adults with primary, secondary, or early latent syphilis will be randomly assig…
Phase 3 • Sponsor: Fundación FLS de Lucha Contra el Sida, las Enfermedades Infecciosas y la Promoción de la Salud y la Ciencia • Aim: Disease control
Last updated Jul 31, 2026 00:00 UTC
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A smartphone app takes on heavy drinking and STIs in high-risk men
Disease control CompletedThis trial tests whether a web-based app called Game Plan can help men who have sex with men reduce heavy drinking and sexually transmitted infections. Participants receive home HIV/STI self-testing kits and are randomly assigned to either a 24-hour helpline alone or the helpline…
Sponsor: Brown University • Aim: Disease control
Last updated Jul 30, 2026 00:00 UTC
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Rapid dual test for HIV and syphilis could save newborns in guatemala
Diagnosis CompletedThis study tested a rapid fingerstick test that checks for both HIV and syphilis at the same time in pregnant women visiting prenatal clinics in Guatemala. The goal was to see if this quick, on-the-spot screening would lead to more women being diagnosed and treated during pregnan…
Sponsor: The University of Texas Health Science Center, Houston • Aim: Diagnosis
Last updated Aug 30, 2026 00:00 UTC
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Rapid HIV tests could end the epidemic by diagnosing in minutes
Diagnosis CompletedThis study tested three rapid, point-of-care HIV tests to see how well they work compared to standard lab tests. Researchers enrolled 224 adults at high risk for HIV in Baltimore. The goal was to see if faster results help more people start treatment or prevention the same day.
Sponsor: Johns Hopkins University • Aim: Diagnosis
Last updated Jun 27, 2026 12:23 UTC
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New rapid syphilis test put to the test in vancouver clinic
Diagnosis CompletedThis study checked how well a new rapid test (Reveal TP) detects syphilis compared to standard lab tests. About 600 adults visiting a Vancouver STI clinic took part. The goal was to see if the quick finger-prick test is accurate enough for routine use.
Sponsor: MedMira Laboratories Inc. • Aim: Diagnosis
Last updated Jun 27, 2026 08:14 UTC
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New rapid tests aim to stop STIs in their tracks for pregnant women in zimbabwe
Diagnosis CompletedThis study tested a strategy of using rapid, point-of-care diagnostic tests for sexually transmitted infections (STIs) in pregnant women attending antenatal clinics in Zimbabwe. Over 1,000 women were offered testing for chlamydia, gonorrhea, trichomoniasis, syphilis, and hepatiti…
Sponsor: London School of Hygiene and Tropical Medicine • Aim: Diagnosis
Last updated Jun 27, 2026 07:51 UTC
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Van clinic delivers lifesaving prevention to women at high risk
Prevention CompletedThis study tested a pop-up clinic inside a van for women who inject drugs and exchange sex in north Seattle. The goal was to see if offering HIV prevention pills, addiction medications, and quick STI testing in a convenient location would help more women start and stay on these t…
Sponsor: University of Washington • Aim: Prevention
Last updated Jun 27, 2026 09:07 UTC
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Phone-Based support could lower HIV and alcohol harm
Prevention CompletedThis study tested a mobile program called Comunică to help Romanian gay and bisexual men reduce HIV risk and heavy drinking. 300 participants used their phones or laptops to complete surveys and eight one-hour sessions with a counselor or by reading health information. The progra…
Sponsor: Columbia University • Aim: Prevention
Last updated Jun 26, 2026 17:15 UTC
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HPV infections in transgender people: a hidden health gap gets a closer look
Knowledge-focused CompletedThis observational study measures how often HPV infections and other sexually transmitted infections occur in transgender adults. Researchers will check for HPV at genital, anal, and oral sites, and also look for anal dysplasia, which can be a precursor to cancer. The study inclu…
Sponsor: ANRS, Emerging Infectious Diseases • Aim: Knowledge-focused
Last updated Sep 04, 2026 00:00 UTC