title: Sensitivity of some smooth strains of Escherichia coli to the bactericidal action of normal human serum.
abstract: The sensitivity to normal human serum of 144 smooth strains of Escherichia coli isolated from cases of urinary tract infection was determined. It was found that serum-sensitive and serum-resistant strains were not randomly distributed throughout the 10 O serogroups commonly associated with urinary infection. A similar distribution was observed when a group of strains isolated from rectal swabs was studied. The results indicate that serum resistance may be related to qualitative characteristics of the O antigen.
mesh_terms: D000942:Antigens, Bacterial; D001770:Blood Bactericidal Activity; D004926:Escherichia coli / Q000145:classification / Q000302:isolation & purification; D006801:Humans; D008826:Microbial Sensitivity Tests; D012703:Serotyping; D013048:Specimen Handling; D014552:Urinary Tract Infections / Q000382:microbiology
chemical_list: D000942:Antigens, Bacterial