title: Evidence supporting the hypothesis that rickettsial virulence factors determine the severity of spotted fever and typhus group infections.
authors.affiliation: Centers for Disease Control, U.S. Public Health Service, Atlanta, Georgia 30333.
authors.forename: J E
authors.initials: JE
authors.lastname: McDade
mesh_terms: D000818:Animals; D006801:Humans; D012283:Rickettsia prowazekii / Q000472:pathogenicity; D012284:Rickettsia rickettsii / Q000472:pathogenicity; D012373:Rocky Mountain Spotted Fever / Q000401:mortality*; D013045:Species Specificity; D014438:Typhus, Epidemic Louse-Borne / Q000401:mortality*; D014774:Virulence