If there is an infection of Trichomonas vaginalis, it can be visible under specific conditions through the use of a test strip method which involves adding potassium hydroxide and requires examination under a microscope, as it is generally invisible to the naked eye. It is recommended that patients diagnosed with Trichomonas vaginalis infection through vaginal discharge testing undergo treatment, including treatment for both partners. The medication generally chosen is metronidazole, which can be taken all at once or in divided doses orally to treat the infection. The standard for curing this infection is to re-examine the vaginal discharge after three menstrual cycles; if the trichomonads are negative, then it is considered cured.