A medium named after a city is used for the isolation of Neisseria gonorrhoeae. Which medium is it?

A medium named after a city is used for the isolation of Neisseria gonorrhoeae. Which medium is it?

• A. MacConkey agar
• B. Xylose-lysine-deoxycholate agar
• C. New York City agar
• D. Brilliant-green agar

Answer: (C)

Isolating Neisseria gonorrhoeae requires a selective, enriched medium that suppresses competing flora while supporting gonococcal growth. Among the options, the medium named after a city is New York City agar, which was developed to selectively grow Neisseria gonorrhoeae from clinical specimens by including antibiotics that inhibit many other bacteria. The other media listed are designed for enteric pathogens or general Gram-negative scraps and are not used to isolate gonococcus, either because they don’t support Neisseria well or because they are not selective for it. Therefore, the medium named after a city used for isolating Neisseria gonorrhoeae is New York City agar.

Isolating Neisseria gonorrhoeae requires a selective, enriched medium that suppresses competing flora while supporting gonococcal growth. Among the options, the medium named after a city is New York City agar, which was developed to selectively grow Neisseria gonorrhoeae from clinical specimens by including antibiotics that inhibit many other bacteria. The other media listed are designed for enteric pathogens or general Gram-negative scraps and are not used to isolate gonococcus, either because they don’t support Neisseria well or because they are not selective for it. Therefore, the medium named after a city used for isolating Neisseria gonorrhoeae is New York City agar.