title: [Genetic analysis of lactose-fermenting Salmonella typhimurium isolated in Rio de Janeiro].
abstract: Lactose fermenting Salmonella typhimurium are endemic in São Paulo, but not in Rio de Janeiro Two isolations are described from the latter city. These Rio de Janeiro strains have a plasmid of 7.4 megadaltons. These plasmids were not auto-transferable, were thermostable and were not eliminated by acridine orange. One of these strains arose from a plasmid that had the lactose operon repressed, leading us to speculate about the evolution of the lactose fermenting character in Brazilian Salmonella.
authors.forename: F P
authors.initials: FP
authors.lastname: Câmara
authors.forename: M A
authors.initials: MA
authors.lastname: Cardoso
authors.forename: D F
authors.initials: DF
authors.lastname: de Almeida
mesh_terms: D001938:Brazil; D003227:Conjugation, Genetic; D005285:Fermentation; D007785:Lactose / Q000378:metabolism*; D007786:Lactose Factors / Q000235:genetics* / Q000502:physiology; D010957:Plasmids / Q000235:genetics*; D011815:R Factors / Q000235:genetics* / Q000502:physiology; D012486:Salmonella typhimurium / Q000235:genetics* / Q000378:metabolism
chemical_list: D007785:Lactose
vernacular_title: Análise genética de Salmonella typhimurium fermentadoras de lactose isoladas no Rio de Janeiro.