Which sexual transmitted disease is caused by a single celled protozoan parasite and can usually be cured with the prescription drug metronidazole?

The sexual transmitted disease that is caused by a single celled protozoan parasite and can usually be cured with the prescription drug metronidazole is trichomoniasis. Trichomoniasis is caused by the protozoan parasite Trichomonas vaginalis, and is the most common non-viral sexually transmitted infection worldwide. It is estimated to infect 180 million people globally each year. Symptoms of trichomoniasis may include: itching, irritation, burning, and pain in the genitals; a strawberry cervix; foul-smelling vaginal discharge; and burning or pain during urination. However, many people infected with Trichomonas vaginalis do not experience any symptoms. Treatment for trichomoniasis typically consists of a single dose of metronidazole or tinidazole.