Genetic analysis of lactose-fermenting Salmonella typhimurium isolated in Rio de Janeiro

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 acr...

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Bibliographic Details
Published in:	Revista da Sociedade Brasileira de Medicina Tropical Vol. 22; no. 2; p. 81
Main Authors:	Câmara, F P, Cardoso, M A, de Almeida, D F
Format:	Journal Article
Language:	Portuguese
Published:	Brazil 01-04-1989
Subjects:	Brazil Conjugation, Genetic Fermentation Lactose - metabolism Lactose Factors - genetics Lactose Factors - physiology Plasmids - genetics R Factors - genetics R Factors - physiology Salmonella typhimurium - genetics Salmonella typhimurium - metabolism Brazil
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Summary:	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.
ISSN:	0037-8682