Final answer:
Trichomoniasis is a common STI caused by the protozoan parasite Trichomonas vaginalis, treated with antiflagellate drugs and causing more severe health risks in women. The correct option is C.
Step-by-step explanation:
Trichomoniasis is caused by a protozoan parasite known as Trichomonas vaginalis. It is a common, sexually transmitted infection (STI) that impacts the urogenital system.
While men often do not show symptoms, infected women can experience urinary discomfort, vaginal discharge, and increased susceptibility to HIV and cervical cancer.
Pregnant women with trichomoniasis also face a higher risk of pre-term delivery. This infection is treated using antiflagellate drugs such as tinidazole and metronidazole.