**Question:** Which of the following is not true about Neisseria gonorrhoeae?

A. Neisseria gonorrhoeae is a Gram-negative diplococcus bacteria that causes gonorrhea.
B. Neisseria gonorrhoeae is highly resistant to multiple antibiotics, including penicillin.
C. Neisseria gonorrhoeae primarily infects the genital tract of both males and females.
D. Neisseria gonorrhoeae is susceptible to the antibiotic ceftriaxone.

**Correct Answer: A (Neisseria gonorrhoeae is susceptible to the antibiotic ceftriaxone)**

**Core Concept:** Neisseria gonorrhoeae is a sexually transmitted pathogen responsible for causing gonorrhea, a sexually transmitted infection (STI). Neisseria gonorrhoeae is a Gram-negative diplococcus bacteria, which means it has a distinctive bacillus shape and is stained purple under the Gram staining technique.

**Why the Correct Answer is Right:** Ceftriaxone is a widely used antibiotic in the treatment of gonorrhea due to its high potency and low toxicity. Ceftriaxone is a broad-spectrum cephalosporin, which binds to penicillin-binding proteins (PBPs) and inhibits bacterial cell wall synthesis, ultimately leading to cell death.

**Why Each Wrong Option is Incorrect:**

A. Neisseria gonorrhoeae is susceptible to ceftriaxone: False. As mentioned, ceftriaxone is an effective antibiotic for treating gonorrhea caused by N. gonorrhoeae.

B. Neisseria gonorrhoeae is highly resistant to multiple antibiotics, including penicillin: True. N. gonorrhoeae is highly resistant to penicillin and other beta-lactam antibiotics due to the production of beta-lactamase enzymes, which degrade the beta-lactam ring of penicillins and cephalosporins, rendering them inactive.

C. Neisseria gonorrhoeae primarily infects the genital tract of both males and females: True. N. gonorrhoeae primarily infects the genital tract, urethra in males, and cervix, endocervix, and endometrium in females.

D. Neisseria gonorrhoeae is susceptible to ceftriaxone: False. Ceftriaxone is effective against N. gonorrhoeae due to its ability to inhibit bacterial cell wall synthesis, which is essential for bacterial survival. However, ceftriaxone is not a component of the first-line treatment for gonorrhea due to the development of resistance among N. gonorrhoeae strains.

**Clinical Pearl:** Ceftriaxone is an essential antibiotic for treating other infections caused by resistant bacteria, but not for treating gonorrhea, which is usually treated with a combination therapy of Ceftriaxone and an antibiotic targeting the pharyngeal bacteria causing