Trichomonas refers to a genus of parasitic protozoa, with Trichomonas vaginalis being the most well-known species that infects humans. It is primarily transmitted through sexual contact and causes trichomoniasis, a common sexually transmitted infection characterized by symptoms such as itching, discharge, and discomfort during urination. While many infected individuals may be asymptomatic, untreated infections can lead to complications, including increased susceptibility to other STIs. Diagnosis is typically made through laboratory tests, and treatment usually involves antibiotics.