Micro Lab 3

Question 1

selective media

Answer 1

• allows growth of some organisms

- inhibits growth of others

Question 2

differential media

Answer 2

• differentiates closely related organisms based on organisms biochemical characteristics

Question 3

blood sheep agar

Answer 3

• differential for which bacterial hemolysis can lyse RBCs

Question 4

TSA

Answer 4

• non-selective
• non-differential
• growth of non-fastidious bacteria

Question 5

MacConkey

Answer 5

• selective for gram neg

- differential on ability to ferment lactose (turn pink)

Question 6

Mannitol Salt Agar

Answer 6

• selective for staph

- differential for mannitol fermenters (turn yellow)