What are three diseases cause by rickettsia bacteria?

Three diseases caused by Rickettsia bacteria include Rocky Mountain spotted fever, which is transmitted by tick bites and characterized by fever and a distinctive rash; typhus, which can be caused by Rickettsia prowazekii and is spread by lice, leading to fever and systemic illness; and scrub typhus, caused by Orientia tsutsugamushi (previously classified within Rickettsia), transmitted by mites and causing fever, rash, and eschar formation. These diseases can be serious and require prompt medical treatment.