Which of the following sexually transmitted diseases is caused by a protozoan?
- A. Gonorrhoea
- B. Syphilis
- C. AIDS
- D. Trichomoniasis
Explanation
Trichomonas vaginalis is a flagellated protozoan causing discharge and irritation, and it is treated with antiprotozoal drugs. Gonorrhoea and syphilis are bacterial and AIDS is viral, so only trichomoniasis fits the protozoan description.