MCQ – 79280

Correct Answer � B Explanation

Answer-B-scrub typhus

• It is a form of typhus caused by Orientia tsutsugamushi first isolated and identified in 1930 in Japan
• Scrub typhus is transmitted by some species of trombiculid mites (“chiggers”, particularly Leptotrombidium deliense), which are found in areas of heavy scrub vegetation.
• The bite of this mite leaves a characteristic black eschar that is useful for making the diagnosis.
• Scrub typhus is endemic to a part of the world known as the “tsutsugamushi triangle” (after the name “Orientia tsutsugamushi” (formerly “Rickettsia tsutsugamushi”), the obligate intracellular gram-negative bacterium causing same), which extends from northern Japan and far-eastern Russia in the north, to the territories around the Solomon Sea into northern Australia in the south, and to Pakistan and Afghanistan in the west.