murine typhus

n.
  1. A comparatively mild, acute, endemic form of typhus caused by the microorganism Rickettsia typhi, transmitted from rats to humans by fleas and characterized by fever, headache, and muscular pain.endemic typhus
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.