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Scarlet fever • Delayed-type skin reactivity to pyrogenic exotoxin Requires prior exposure • Diffuse erythematous eruption that generally occurs with pharyngitis - Blanching - Many small (1 to 2 mm) papules -> "sandpaper" quality - groin and armpits -> trunk/extremities - circumoral pallor - strawberry tongue - Pastia lines = petechial lines in the antecubital fossae and axillary folds #Scarlet #fever #diagnosis #clinical #photo #signs #symptoms