Introduction Causative agent : Trichomonas vaginalis Transmission : Sexual contact Incubation period : 3 – 28 days. Clinical features Sudden profuse and offensive vaginal discharge. Severe irritation and itching around introitus. Dysuria and increased frequency of urine. Examination: Thin, greenish yellow frothy offensive vaginal discharge. Inflammed vulva Vaginal examination may be painful. Diagnosis: Culture of discharge : Diamonds TYM or Feinberg Whittington medium. Treatment: DOC : Metronidazole 200mg TDS x 1 week. Tinidazole