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Rocky Mountain Spotted Fever

Rocky Mountain Spotted Fever is a topic covered in the 5-Minute Emergency Consult.

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Rickettsial invasion of small blood vessels:
  • Causes direct vascular damage
  • Superimposed additional vascular damage/vasculitis due to immunologic phenomena


  • Acute infection by Rickettsia rickettsii via tick vector:
    • Dermacentor andersoni (wood tick) in the western states
    • Dermacentor variabilis (dog tick) in the eastern states
  • Reported in all states; 1/2 of cases occur in 5 states (NC, SC, TN, OK, AR), as well as parts of Central America and South America
  • More common April–September, but can occur any month
  • More common in males and in individuals 40–64 yr of age

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TY - ELEC T1 - Rocky Mountain Spotted Fever ID - 307562 ED - Barkin,Adam Z, ED - Barkin,Roger M, ED - Hayden,Stephen R, ED - Rosen,Peter, ED - Schaider,Jeffrey J, ED - Shayne,Philip, ED - Wolfe,Richard E, BT - 5-Minute Emergency Consult UR - https://emergency.unboundmedicine.com/emergency/view/5-Minute_Emergency_Consult/307562/all/Rocky_Mountain_Spotted_Fever PB - Lippincott Williams & Wilkins ET - 5 DB - Emergency Central DP - Unbound Medicine ER -