title: The host specificities of the Z20 and CF2004-6 strains of an Escherichia coli O4 serotype.
mesh_terms: D002876:Chromosomes, Bacterial; D003090:Coliphages; D003227:Conjugation, Genetic; D004926:Escherichia coli; D008040:Genetic Linkage; D011995:Recombination, Genetic; D012703:Serotyping; D013912:Threonine; D014161:Transduction, Genetic
chemical_list: D013912:Threonine