title: Preparation of immunologically active substances from Salmonella typhi.
mesh_terms: D000818:Animals; D003470:Culture Media; D007122:Immunoelectrophoresis; D051379:Mice; D011817:Rabbits; D012485:Salmonella typhi / Q000276:immunology*; D014436:Typhoid-Paratyphoid Vaccines / Q000494:pharmacology*
chemical_list: D003470:Culture Media; D014436:Typhoid-Paratyphoid Vaccines