Scrub Typhus, or tsutsugamushi disease is a febrile illness caused by bacteria of the family rickettsiaceae and named Orientia tsutsugamushi. Scrub typhus is endemic to a geographically distinct region, the so-called tsutsugamushi triangle, which includes Japan, Taiwan, China, and South Korea. It also occurs in nepal, northern Pakistan, Papua new Guinea, and the Australian states of Queensland and northern new South Wales.
In India, the disease had occurred among troops during World War II in Assam and West Bengal, and in the 1965 Indo-Pak war. There was a resurgence of the disease in 1990 in a unit of an army deployed at the Pakistan border of India. It is known to occur all over India, including Southern India and northern India.