What infection of the female reproductive tract is caused by bacteria, fungi, or viruses?

• A. Renal Calculi
• B. Spontaneous Abortion
• C. Pelvic Inflammatory Disease (PID)
• D. Placenta Previa

Answer: (C)

Pelvic inflammatory disease is an infection of the upper female reproductive tract—the uterus, fallopian tubes, and ovaries. It is the best choice because it directly describes an infectious process involving the reproductive organs, usually due to bacteria that ascend from the cervix (often linked to sexually transmitted infections like chlamydia or gonorrhea). The other options describe conditions that are not infections of the reproductive tract: kidney stones affect the kidneys, spontaneous abortion is pregnancy loss, and placenta previa is a placental misplacement during pregnancy. PID is clinically important because it can lead to infertility, ectopic pregnancy, and chronic pelvic pain if not treated promptly.