title: Rocky Mountain spotted fever and human ehrlichiosis--United States, 1989.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D004536:Ehrlichia; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012288:Rickettsiaceae Infections / Q000453:epidemiology*; D012373:Rocky Mountain Spotted Fever / Q000453:epidemiology*; D014481:United States / Q000453:epidemiology