Rickettsial diseases.
D000818:Animals; D001179:Arthropod Vectors; D002417:Cattle; D006168:Guinea Pigs; D000882:Haplorhini; D006801:Humans; D007114:Immunization; D051379:Mice; D012285:Orientia tsutsugamushi; D011778:Q Fever; D012282:Rickettsia Infections; D012283:Rickettsia prowazekii / Q000276:immunology; D012612:Scrub Typhus; D014438:Typhus, Epidemic Louse-Borne / Q000276:immunology