ORIENTIA TSUTSUGAMUSHI. Bacterium Orientia tsutsugamushi colorized TEM. This bacterium is recovered of a cellular membrane coming from the host cell mesothelial origin of which it has just come out See images 1478507, 1478607, 1478707 and 1478807 for the bacterium burgeonning of the host cell. This specimen comes from the peritoneal cavity of a mouse infected experimentally. Orientia tsutsugamushi, formerly known as Rickettsia tsutsugamushi, is a bacterium responsible for scrub typhus or Japanes