Influence of growth temperature on the development of Escherichia coli polysaccharide K antigens.
The established seventy-one Escherichia coli polysaccharide capsular K antigenic test strains were examined for the development of the K antigen after growth at 37 degrees C and 18 degrees C. Twenty-eight K antigens were not detectable after growth of bacteria at 18 degrees C, while the remaining 43 antigens were developed at both temperatures. Most of the temperature-dependent antigens belonged to electrophoretically fast-moving K polysaccharides of rather low molecular weight, characteristically found among the common K antigens from extraintestinal disease isolates. Lipopolysaccharide O antigens were developed at both growth temperatures.
D000942:Antigens, Bacterial / Q000276:immunology*; D000954:Antigens, Surface / Q000276:immunology*; D004926:Escherichia coli / Q000254:growth & development / Q000276:immunology*; D007123:Immunoelectrophoresis, Two-Dimensional; D011135:Polysaccharides, Bacterial / Q000276:immunology*; D013696:Temperature
D000942:Antigens, Bacterial; D000954:Antigens, Surface; C030659:K antigens; D011135:Polysaccharides, Bacterial