[Tsutsugamushi Disease].

Tsutsugamushi disease is an infectious disease caused by Orientia tsutsugamushi and transmitted by chiggers. The ancient classical form (summer onset) has almost disappeared, but the new form (spring and autumn onset) occurs in 300-500 cases annually. Symptoms include fever, rash, and bites. If the disease worsens, it can lead to meningoencephalitis, disseminated intravascular coagulation, and become fatal. Diagnosis involves confirming an increase in specific serum antibodies or detecting the gene in crusts. Prompt tetracycline treatment is important.