**Question:** Drug used in the treatment of resistant gonorrhoea is:

A. Ceftriaxone
B. Azithromycin
C. Trimethoprim
D. Metronidazole

**Core Concept:**
Gonorrhoea is a sexually transmitted infection caused by the bacterium Neisseria gonorrhoeae. Antibiotics are commonly used to treat uncomplicated gonorrhoea, but the emergence of antibiotic-resistant strains has led to the development of alternative treatments. In the context of resistant gonorrhoea, the focus is on antibiotics that are still effective against the resistant strains.

**Why the Correct Answer is Right:**
Ceftriaxone is a third-generation cephalosporin antibiotic that is highly effective against Neisseria gonorrhoeae, including resistant strains. It works by inhibiting bacterial cell wall synthesis, leading to cell lysis and death. Ceftriaxone is a commonly used antibiotic for treating gonorrhoea, particularly when other options are no longer effective.

**Why Each Wrong Option is Incorrect:**
Azithromycin is a macrolide antibiotic primarily effective against gram-positive bacteria and certain atypical pathogens. While it has some activity against Neisseria gonorrhoeae, it is less effective against resistant strains compared to ceftriaxone.

Trimethoprim is an antibiotic primarily used for treating urinary tract infections and prophylaxis for Pneumocystis jirovecii pneumonia in immunocompromised patients. Trimethoprim has limited activity against Neisseria gonorrhoeae and is not effective against resistant strains.

Metronidazole is an antiprotozoal agent primarily used to treat parasitic infections, including Giardiasis and Trichomoniasis. Although metronidazole has some activity against Neisseria gonorrhoeae, it is less effective against resistant strains compared to ceftriaxone and is therefore not the ideal choice for treating resistant gonorrhoea.

**Clinical Pearl:**
Gonorrhoea is a sexually transmitted infection caused by Neisseria gonorrhoeae, which can lead to severe complications if left untreated. The emergence of antibiotic-resistant strains has necessitated the use of effective antibiotics like ceftriaxone for treating gonorrhoea. The choice of antibiotic depends on the specific strain of Neisseria gonorrhoeae involved, as some strains may be resistant to multiple antibiotics.