Comparison of genomic DNAs of different enterococcal isolates using restriction endonucleases with infrequent recognition sites

B. E. Murray, K. V. Singh, J. D. Heath, B. R. Sharma, G. M. Weinstock

Research output: Contribution to journalArticlepeer-review

Abstract

Epidemiologic evaluation of enterococci has been limited by the lack of a simple and effective method for comparing strains. In this study, we have compared chromosomal restriction endonuclease digestion patterns of 27 isolates of Enterococcus faecalis from three different locations by using pulsed-field electrophoresis of large chromosomal fragments (14 to 1,000 kilobases). All but two isolates generated a clear, evaluable pattern with a single lysis and digestion, and the remaining two were visualized when a larger quantity of bacteria was used. All isolates from different locations generated different restriction patterns, as did most isolates within a single location; there was also evidence of spread of strains between individuals in each location. The ease with which this analysis can be performed, together with the clarity and polymorphism seen in the patterns, suggests that this technique will be very useful for epidemiological evaluations of nonsocomial enterococcal infections.

Original languageEnglish (US)
Pages (from-to)2059-2063
Number of pages5
JournalJournal of Clinical Microbiology
Volume28
Issue number9
DOIs
StatePublished - 1990

ASJC Scopus subject areas

  • Microbiology (medical)

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