PANCE Practice Test

Category - PA

Which of the following is the causative organism for Rocky Mountain spotted fever?
  1. Bordetella pertussis
  2. Rickettsia rickettsii
  3. Rickettsia siberica
  4. Corynebacterium
Explanation
Answer: B - Rickettsia rickettsii is the cause of Rocky Mountain spotted fever (RMSF) and is the prototype bacterium in the spotted fever group of rickettsiae. Rickettsia rickettsii is found in the Americas and is transmitted to humans through the bite of infected ticks.
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