PID can be due to:
**Core Concept**
Pelvic inflammatory disease (PID) is a bacterial infection of the upper female genital tract, primarily affecting the uterus, fallopian tubes, and ovaries. It is usually caused by sexually transmitted pathogens, such as Neisseria gonorrhoeae and Chlamydia trachomatis.
**Why the Correct Answer is Right**
PID occurs when these pathogens ascend from the vagina and cervix to the upper genital tract. This ascent is facilitated by the presence of a foreign body, such as an intrauterine device (IUD), which can cause minor trauma and disrupt the mucosal barrier. The use of an IUD increases the risk of PID by 7-10 times, making it a significant risk factor.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because PID is not primarily caused by bacterial vaginosis. While bacterial vaginosis can increase the risk of PID by altering the vaginal microbiome, it is not a direct cause of the disease.
**Option B:** This option is incorrect because PID is not caused by a viral infection. While certain viral infections, such as herpes simplex virus, can cause genital symptoms, they are not associated with the development of PID.
**Option C:** This option is incorrect because PID is not caused by a fungal infection. While fungal infections, such as candidiasis, can cause genital symptoms, they are not associated with the development of PID.
**Clinical Pearl / High-Yield Fact**
The use of an IUD can increase the risk of PID due to minor trauma and disruption of the mucosal barrier. This is a critical consideration for patients with a history of pelvic surgery or previous PID.
**Correct Answer:** C.