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. (NCLEX/HESI/TEAS)

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.