Tsutsugamushi disease, also known as scrub typhus, is an acute febrile illness caused by the bacterium Orientia tsutsugamushi. It is transmitted by the bite of infected larval mites (chiggers) and is most common in the Asia-Pacific region, affecting people exposed to mite-infested scrub or rural areas.
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The disease was first clinically described in Japan in 1899 by Dr. Michitaro Nagayo, though earlier accounts existed. It gained significant attention during World War II, causing widespread illness among Allied troops in the Pacific theater, leading to intensive research efforts. Today, it remains a major public health concern in many endemic countries.
Tsutsugamushi disease is transmitted to humans through the bite of infected larval mites (chiggers) of the Trombiculid family. These mites acquire the bacteria by feeding on rodents (such as rats) that harbor the infection, and they can also transmit it generationally. The infection is not transmitted directly from person to person.
Contagious Period: Varies by disease
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Our AI-powered surveillance hasn't detected significant Tsutsugamushi disease activity in the past 30 days.
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Currently, Tsutsugamushi disease case counts are within baseline expectations globally. However, diseases can emerge rapidly, which is why continuous monitoring is critical.
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Even without active outbreaks, understanding Tsutsugamushi disease prevention helps protect you and your community:
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Trusted information from leading health organizations
Official guidance from the U.S. Centers for Disease Control and Prevention
View CDC Resources →Global disease surveillance and guidelines from the World Health Organization
View WHO Resources →Disease information on Virus Watcher is reviewed by our Chief Epidemiologist, a former CDC lead analyst for FluSight forecasting. Outbreak data is aggregated from verified sources including BEACON, ProMED, WHO, CDC, and 50+ national health agencies. This information is for educational purposes and should not replace professional medical advice.
Last reviewed: 2026-07-18
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