title: The fimbrial and non-fimbrial haemagglutinins of Escherichia coli.
abstract: Both cultures of Escherichia coli were examined for mannose-sensitive (MS) haemagglutinin in rocked-tile tests with guinea-pig red cells at ambient temperature, and agar plate cultures were examined for mannose-resistant eluting (MRE) haemagglutinins against 14 species of red cells in tests mixed at 3--5 degrees C in the presence of .05% (w/v) D-mannose. Ox, sheep, human, pig, horse, guinea-pig, and fowl red cells were required to detect the various patterns of MRE haemagglutination with the different species of cells. Of 387 strains in 155 O serogroups, 95 formed both MS and MRE haemagglutinins (MS+/MRE+), 198 formed only MS (MS+/MRE-), 21 only MRE (MS+/MRE+), and 73 neither (MS-/MRE-). Strains of more than one of these types, and MRE+ strains with different cell specificities were found in many of the serogroups. Some strains in 144 O serogroups had MS haemagglutinin and some in 50 an MRE haemagglutinin. The presence of MS haemagglutinin in a culture was invariably associated with the presence of type-1 fimbriae on the bacteria. All MS+ strains shared a common antigen in their type-1 fimbriae and three groups of these strains possessed also a group-specific fimbrial antigen. The presence of certain kinds of MRE haemagglutinin in over half the MRE+ strains was associated with that of type-MRE fimbriae, but fimbriae were not detected in the other MRE+ strains. The antigens of the MRE haemagglutinins in different strains were heterogeneous and differed from those of the type-1 fimbriae of MS+ strains. Three series of strains from normal faeces, and from patients with infantile diarrhoea and urinary-tract infections each included a minority possessing neither type of haemagglutinin, but this observation did not preclude a role of the haemagglutinins in colonization or pathogenicity.
mesh_terms: D000328:Adult; D000373:Agglutinins / Q000032:analysis*; D000818:Animals; D002473:Cell Wall / Q000276:immunology / Q000648:ultrastructure; D002648:Child; D004912:Erythrocytes / Q000276:immunology; D004926:Escherichia coli / Q000276:immunology* / Q000648:ultrastructure; D004927:Escherichia coli Infections / Q000382:microbiology; D005759:Gastroenteritis / Q000382:microbiology; D006384:Hemagglutination; D006388:Hemagglutinins / Q000032:analysis* / Q000276:immunology; D006801:Humans; D013045:Species Specificity; D014552:Urinary Tract Infections / Q000382:microbiology
chemical_list: D000373:Agglutinins; D006388:Hemagglutinins