MacConkey agar is used to:
A) Differentiate between hemolytic and nonhemolytic gram-negative rods.
B) Show the clear, pinpoint colonies of Haemophilus influenzae.
C) Demonstrate the large, pink colonies of Neisseria meningitidis.
D) Differentiate between lactose fermenters and lactose nonfermenters.

Question

Quizplus · Accepted Answer

MacConkey (MAC)agar is a differential media used to distinguish between lactose fermenters and lactose nonfermenters.Lactose fermenters produce dark pink to red colonies and lactose nonfermenters produce colorless colonies.Hemolysis is determined only on sheep blood agar.H.influenzae and N.meningitidis are two fastidious species that do not grow on MAC because they require additional nutrients that are found in chocolate agar.

MacConkey Agar Is Used To