Genotypic and serotypic stability of Campylobacter jejuni strains during in vitro and in vivo passage

Eva M. Nielsen, J. Engberg, V. Fussing

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    The stability of four typing methods and the sero- and genotypic stability of three Campylobacter jejuni strains were evaluated after subculturing 50 times in triplicate and after colonising mice for up to 26 days. The employed methods were Penner heat-stable serotyping; automated ribotyping (RiboPrinting) using HaeIII restriction enzyme; pulsed-field gel electrophoresis (PFGE) using SmaI, SalI and KpnI; and random amplified polymorphic DNA analysis (RAPD) using primers 1254, 1281 and HLWL85. No changes in any of the DNA profiles or in the reactions to heat-stable antigens were identified among these strains after the in vitro and in vivo passages. However, one isolate became untypeable with RAPD after passage in one of the mice. In addition, eleven other C. jejuni strains of four different serotypes were subcultured ten times to screen for instability. Neither of these showed instability using PFGE and serotyping. Furthermore, three of four strains previously identified as unstable, showed to consist of mixed cultures, which explains the reported profile changes. The results indicate that the applied typing methods are reliable and applicable for typing of Campylobacter isolates from different sources over time, and that many C. jejuni strains are genetically stable as tested by these methods.
    Original languageEnglish
    JournalInternational Journal of Medical Microbiology
    Volume291
    Issue number5
    Pages (from-to)379-385
    ISSN1438-4221
    DOIs
    Publication statusPublished - 2001

    Keywords

    • Campylobacter jejuni
    • stability
    • typing

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