title: Typhoid fever 1979--a new perspective on an old disease.
mesh_terms: D000667:Ampicillin / Q000494:pharmacology; D002701:Chloramphenicol / Q000494:pharmacology; D006801:Humans; D010403:Penicillin Resistance; D010957:Plasmids; D012485:Salmonella typhi / Q000187:drug effects / Q000235:genetics* / Q000276:immunology; D013045:Species Specificity; D014178:Translocation, Genetic; D014435:Typhoid Fever / Q000276:immunology*
chemical_list: D002701:Chloramphenicol; D000667:Ampicillin