How do group A streptococci camouflage themselves from white blood cells?
A. They grow in chains or pairs.
B. They have hyaluronic acid capsules.
C. They produce streptokinase, which breaks down blood clots.
D. They have protein M in their capsule, which destabilizes complement and interferes with opsonization. E. They stain as Gram-positive.
Answer: B. They have hyaluronic acid capsules.
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