Where do gonococci initially infect
**Core Concept**
Neisseria gonorrhoeae, the causative agent of gonorrhea, initially infects the mucous membranes of the urogenital tract in humans. This is a sexually transmitted infection (STI) that can cause various symptoms in both men and women.
**Why the Correct Answer is Right**
The initial site of infection is the mucous membranes of the urogenital tract, which include the cervix in women and the urethra in men. The bacteria adhere to the epithelial cells in these areas and begin to multiply, leading to an inflammatory response and the development of symptoms. The exact mechanism of adherence involves the interaction between the pili proteins on the surface of the bacteria and the glycolipids on the host cells.
**Why Each Wrong Option is Incorrect**
**Option A:** The conjunctiva is a site of infection for Neisseria gonorrhoeae, but it is not the initial site of infection.
**Option B:** The pharynx can be a site of infection for gonorrhea, but it is not the primary site of infection.
**Option C:** The skin is not typically a site of infection for gonorrhea.
**Clinical Pearl / High-Yield Fact**
It is essential to remember that gonorrhea can cause serious complications if left untreated, including pelvic inflammatory disease (PID) in women and epididymitis in men.
**Correct Answer:** D.