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학습 자료 둘러보기 →The hallmark of scarlet fever is a fine, red, sandpaper-like rash that blanches with pressure. It typically appears 12 to 48 hours after the onset of fever and sore throat, starting on the trunk and spreading to the extremities.
This exanthem is caused by pyrogenic exotoxins released by Group A Streptococcus. Other associated findings include a strawberry tongue and Pastia's lines (linear petechiae in skin folds).
Do not confuse with Koplik spots (measles) which are white buccal lesions, or the vesicular rash of varicella. The sandpaper texture is the key differentiator for scarlet fever.
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