Micro & Immunology · single question
Which organism causes scarlet fever?
Show answer and explanation
Correct answer: A. Group A Streptococcus (Streptococcus pyogenes)
- A. Correct. Scarlet fever is caused by erythrogenic-toxin-producing Streptococcus pyogenes (Group A strep), with sore throat, sandpaper rash, and strawberry tongue.
- B. S. aureus causes skin/soft-tissue and toxic-shock infections, not classic scarlet fever.
- C. S. mutans is a cariogenic oral organism.
- D. EBV causes infectious mononucleosis, not scarlet fever.
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