Explore the recorded discovery and history of Trichomonas vaginalis, with source links and stated limits.
A flagellated protozoan that causes trichomoniasis, a sexually transmitted infection. Most infections have no symptoms. Symptoms cannot confirm this infection without clinical testing.
The selected sources do not establish the first person ever infected. Naming, recognition and biological origin are separate questions.
Source check: 2026-09-21. Educational content; independent scientific review remains pending.