[Prevalence and transferability of the plasmid lac+ character in "Klebsiella" sp. strains with "lac+-forte" phenotype].

Abstract excerpt

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.

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