is trich the most common std
Trichomoniasis, sometimes called trich (pronounced trick), is a common sexually transmitted infection (STI) that affects both females and males, but symptoms are more common in females. Trichomoniasis is caused by the single-celled protozoan parasite, Trichomonas vaginalis. The vagina is the most common site of infection in girls and women, and the urethra (urine canal) is the most common site of infection in boys and men. The parasite is sexually transmitted throughsex (penis-to-vagina or vulva-to-vulva contact) with an infected partner.