title: Changes in antigenic structure of S. flexneri 1a as a result of genetic recombination with E. coli.
mesh_terms: D000942:Antigens, Bacterial / Q000276:immunology*; D003227:Conjugation, Genetic; D004926:Escherichia coli / Q000235:genetics*; D007763:Lac Operon / Q000235:genetics; D011995:Recombination, Genetic; D012763:Shigella flexneri / Q000235:genetics / Q000276:immunology*
chemical_list: D000942:Antigens, Bacterial