title: Isolation and characterization of two Salmonella typhosa mutants for a possible use as a live oral attenuated vaccinal strains.
mesh_terms: D000284:Administration, Oral; D000818:Animals; D051379:Mice; D009154:Mutation; D012485:Salmonella typhi / Q000276:immunology* / Q000302:isolation & purification; D014436:Typhoid-Paratyphoid Vaccines / Q000008:administration & dosage / Q000302:isolation & purification*; D014613:Vaccines, Attenuated / Q000302:isolation & purification
chemical_list: D014436:Typhoid-Paratyphoid Vaccines; D014613:Vaccines, Attenuated