TRICHOMONAS VAGINALIS PCR test can help detect TRICHOMONAS VAGINALIS infection. TRICHOMONAS VAGINALIS infection often presents as Itching, burning, redness or soreness of the genitals, pain during urination and clear, white/ yellowish/ greenish vaginal discharge with a fishy smell. Consult a doctor if you are experiencing any of the above symptoms for the diagnosis and necessary treatment.