The causes can range from viral to protozoal, bacterial or spirochaetal.
Rajagopal R, Khati C, Vasdev V, Trehan A 2003, 'Scrub typhus: A case report', Indian Journal of Dermatology, Venereology and Leprologyhttp://www.ijdvl.com/article.asp?issn=0378-6323;year=2003;volume=69;issue=6;spage=413;epage=415;aulast=Rajagopal. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)