Colonies of Streptococcus pneumoniae appear α-hemolytic on blood agar media.Which one of the following statements explains this discrepancy?
A) The lot of blood agar may be expired.
B) Something may be wrong with the strain of S.pneumoniae since it should be β-hemolytic on blood agar.
C) Something may be wrong with the strain of S.pneumoniae;it should be γ-hemolytic on blood agar.
D) No discrepancy is present.S.pneumoniae should be α-hemolytic on blood agar.
Correct Answer:
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