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What Differentiates Virulent Strains of Streptococcus Pneumoniae from Nonvirulent Strains

Question 12

Multiple Choice

What differentiates virulent strains of Streptococcus pneumoniae from nonvirulent strains?


A) the species-specific teichoic acid present in its cell wall
B) the type of Lancefield antigen it produces
C) the presence of a polysaccharide capsule
D) the type of toxins it produces
E) the extent of the hemolytic zone it produces when it is grown on blood agar

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