MacConkey Agar

The video tutorial explains the use of MacConkey Agar, a selective and differential medium used to identify gram-negative bacteria and their ability to ferment lactose. It details the selective nature of the agar, which inhibits gram-positive bacteria, and the differential aspect, which distinguishes lactose fermenters by color change. The tutorial guides viewers through interpreting results based on growth and color, emphasizing the importance of these observations in determining bacterial characteristics.

How can you determine if an organism is lactose positive or negative using Macconkey Agar?

What does a pink coloration around colonies on Macconkey Agar indicate?

What would you report if there is no growth on a Macconkey Agar plate?