Trichomonas vaginalis is a tiny, single-celled parasite that causes a common sexually transmitted infection (STI) known as trichomoniasis. This infection primarily affects the genital tract in both men and women, but it is more prevalent in women. Symptoms can include itching, burning, and unusual discharge, although many people may not show any signs at all. The parasite is typically spread through sexual contact, making safe practices important for prevention. Treatment usually involves antibiotics, which can effectively clear the infection. Regular check-ups and open communication with partners are essential for maintaining sexual health and preventing the spread of Trichomonas vaginalis.