Explain the difference between a selective medium and a differential medium. Give an
example of each type. [2 marks]
In the laboratory we plated our nose and throat swabs onto Blood Agar plates which is
an enriched medium. Why did we plate those particular samples on Blood Agar and
not Nutrient Agar? What other useful property does Blood Agar have and what does
it tell us about the bacteria growing on it?