Multiple choice

Which of the following types of organisms produce colonies on Columbia nalidixic acid agar?

  1. Gram-positive cocci

  2. Gram-negative cocci

  3. Gram-positive bacilli

  4. Gram-negative bacilli

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Gram-positive cocci produce colonies on Columbia nalidixic acid agar. Columbia nalidixic acid agar with sheep blood is a selective microbiological medium.