10. Dynamics of Microbial Growth

A blood agar plate is a common type of differential media. If there are different species of bacteria on a blood agar plate, what will the zones of clearance around the bacteria show you?

Streptococcus pneumoniae is an alpha-hemolytic bacterial species. If Streptococcus pneumoniae is grown on a blood agar plate, what characteristics will the zone of clearance for this species have?

A bacterial specimen exhibits the following growth on blood agar. What can you most reasonably conclude about the bacterium? Select all that apply.

a. It is not S. pyogenes.

b. It is alpha hemolytic.

c. It is beta hemolytic.

d. It is gamma hemolytic.

e. It is Gram-positive.

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