title: A comparative study of the pathogenicities of old and new world strains of Ehrlichia canis.
mesh_terms: D000818:Animals; D001419:Bacteria / Q000472:pathogenicity*; D004283:Dog Diseases / Q000209:etiology* / Q000276:immunology; D004285:Dogs; D004536:Ehrlichia / Q000276:immunology / Q000472:pathogenicity; D012288:Rickettsiaceae Infections / Q000209:etiology / Q000276:immunology / Q000662:veterinary*; D018805:Sepsis / Q000209:etiology / Q000276:immunology / Q000662:veterinary*