title: Aromatic-dependent Salmonella typhimurium are non-virulent and effective as live vaccines.
mesh_terms: D000818:Animals; D001428:Bacterial Vaccines; D004352:Drug Resistance, Microbial; D051379:Mice; D008810:Mice, Inbred C57BL; D009154:Mutation; D010649:Phenylalanine; D012486:Salmonella typhimurium / Q000235:genetics / Q000472:pathogenicity*; D013045:Species Specificity; D013752:Tetracycline / Q000494:pharmacology; D014161:Transduction, Genetic; D014364:Tryptophan / Q000378:metabolism; D014443:Tyrosine / Q000378:metabolism
chemical_list: D001428:Bacterial Vaccines; D014443:Tyrosine; D010649:Phenylalanine; D014364:Tryptophan; D013752:Tetracycline