title: Substitution of virulent Shigella and Escherichia coli variants by avirulent germs in mixed culture.
mesh_terms: D001428:Bacterial Vaccines; D003470:Culture Media; D004926:Escherichia coli / Q000254:growth & development / Q000472:pathogenicity*; D014644:Genetic Variation; D012763:Shigella flexneri / Q000254:growth & development / Q000472:pathogenicity*; D012764:Shigella sonnei / Q000254:growth & development / Q000472:pathogenicity*; D014613:Vaccines, Attenuated; D014774:Virulence
chemical_list: D001428:Bacterial Vaccines; D003470:Culture Media; D014613:Vaccines, Attenuated