infection with Rickettsia typhi (mooseri) causing a syndrome similar to epidemic typhus, but spread from rats to humans by the rat flea (Xenopsylla [polyplax] cheopis). Spread from rat to rat by the rat louse (Polyplax spinulosa). Most common form of typhus in the U.S. It has various geographic names based on the region in which it was observed.
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Examples: glitazone, GI cocktail, etc.