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학습 자료 둘러보기 →The rash of Rocky Mountain spotted fever is a direct result of vasculitis caused by Rickettsia rickettsii. It typically appears 3 or more days after the onset of non-specific symptoms like fever and headache.
The classic pattern begins as small, flat, pink macules on the wrists, forearms, and ankles. It then spreads centrally to the trunk, palms, and soles. The rash evolves into petechiae, which are non-blanching spots indicating microvascular bleeding.
Do not wait for the petechial rash to develop before initiating treatment. Early empiric therapy with doxycycline is crucial, as delayed treatment significantly increases mortality risk.
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