Rocky Mountain spotted fever is a tick-borne illness. The etiologic
agent is the gram negative intracellular bacterium Rickettsia
rickettsii. When do symptoms typically develop after exposure? What
are the presenting clinical manifestations?

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The Answer is:

RMSF symptoms typically develop 5-7 days after exposure.
Manifestations include nonspecific abdominal pain followed by
development of a maculopapular, erythematous, nonpruritic rash with
distal-to-proximal progression (Mayo Clin Proc, 1/08, pg. 94).