title: [Prevalence and transferability of the plasmid lac+ character in "Klebsiella" sp. strains with "lac+-forte" phenotype].
abstract: 36 strains of Klebsiella sp. showing a strong lactose-positive phenotype were examined for presence of R factors and for ability to promote the transfer of character lac+; 10 of the 13 R+ strains were able to transfer lac+ character and 4 showed the presence of R-lac factors. Transfer of R-lac factors from Klebsiella sp. strains to Salmonella typhi clinical isolates has also been obtained.
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology; D007709:Klebsiella / Q000187:drug effects / Q000235:genetics*; D007785:Lactose; D010641:Phenotype; D011815:R Factors; D012485:Salmonella typhi / Q000187:drug effects / Q000235:genetics*
chemical_list: D000900:Anti-Bacterial Agents; D007785:Lactose
vernacular_title: Prevalenza e trasmissibilità del carattere lac+ plasmidico in stipiti di "Klebsiella" sp. con fenotipo "lac+-forte".