caused by Orientia tsutsugamushi, a gram-negative intracellular coccobacillus. It is transmitted to humans and other vertebrates through the bite of the larval trombiculid mites (known as Chiggers) harbouring the etiological agent. The mites normally feed upon single vertebrate hosts, usually rodents. Febrile illness typically begins after the bite of an infected chigger and lasts for 7–10 days...