The virulence plasmid of Salmonella typhimurium is self-transmissible

Brian M M Ahmer, Mimi Tran, Fred Heffron

    Research output: Contribution to journalArticle

    72 Citations (Scopus)

    Abstract

    Most isolates of Salmonella enterica serovar Typhimurium contain a 90- kb virulence plasmid. This plasmid is reported to be mobilizable but nonconjugative. However, we have determined that the virulence plasmid of strains LT2, 14028, and SR-11 is indeed self-transmissible. The plasmid of strain SL1344 is not. Optimal conjugation frequency requires filter matings on M9 minimal glucose plates with a recipient strain lacking the virulence plasmid. These conditions result in a frequency of 2.9 x 10-4 transconjugants/donor. Matings on Luria-Bertani plates, liquid matings, or matings with a recipient strain carrying the virulence plasmid reduce the efficiency by up to 400-fold. Homologs of the F plasmid conjugation genes are physically located on the virulence plasmid and are required for the conjugative phenotype.

    Original languageEnglish (US)
    Pages (from-to)1364-1368
    Number of pages5
    JournalJournal of Bacteriology
    Volume181
    Issue number4
    StatePublished - Feb 1999

    Fingerprint

    Salmonella typhimurium
    Virulence
    Plasmids
    F Factor
    Salmonella enterica
    Phenotype
    Glucose
    Genes

    ASJC Scopus subject areas

    • Applied Microbiology and Biotechnology
    • Immunology

    Cite this

    Ahmer, B. M. M., Tran, M., & Heffron, F. (1999). The virulence plasmid of Salmonella typhimurium is self-transmissible. Journal of Bacteriology, 181(4), 1364-1368.

    The virulence plasmid of Salmonella typhimurium is self-transmissible. / Ahmer, Brian M M; Tran, Mimi; Heffron, Fred.

    In: Journal of Bacteriology, Vol. 181, No. 4, 02.1999, p. 1364-1368.

    Research output: Contribution to journalArticle

    Ahmer, BMM, Tran, M & Heffron, F 1999, 'The virulence plasmid of Salmonella typhimurium is self-transmissible', Journal of Bacteriology, vol. 181, no. 4, pp. 1364-1368.
    Ahmer, Brian M M ; Tran, Mimi ; Heffron, Fred. / The virulence plasmid of Salmonella typhimurium is self-transmissible. In: Journal of Bacteriology. 1999 ; Vol. 181, No. 4. pp. 1364-1368.
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