MacConkey Agar Flashcards
What is the application (purpose) of MacConkey agar?
Used to isolate and differentiate members of the enterobacteriaceae based on the ability to ferment lactose.
What does carbon supply in the MCC agar?
____ supplies pancreatic digest of gelatin and casein in MCC agar
What does Nitrogen supply in the MCC agar?
____ supplies peptic digest of animal tissue
What are the roles of crystal violet and bile salts in MacConkey agar?
Inhibit the growth of gram positive bacteria
What are the roles of neutral red and lactose in MacConkey agar?
Neutral red is a pH indicator à COLORLESS: 6.8 +; RED: below 6.8
Lactose – fermented to produce acid end products which lower the pH and turn colonies pink-red