The colonial morphologic features of this organism resemble a donut as it ages,and it has a polysaccharide capsule that is responsible for its virulence.What two characteristics describe this organism?
A)β-hemolytic and susceptible to optochin
B)α-hemolytic and bile solubility-negative
C)γ-hemolytic and resistant to optochin
D)α-hemolytic and bile solubility-positive

Question

Quizplus · Accepted Answer

Based on the morphologic features listed,the organism is S.pneumoniae.The organism is α-hemolytic and positive for bile solubility so the only answer that describes this organism is D.

The Colonial Morphologic Features of This Organism Resemble a Donut