Comparison and genomic sizing of Escherichia coli O157:H7 isolates by pulsed-field gel electrophoresis
- PMID: 8215383
- PMCID: PMC182421
- DOI: 10.1128/aem.59.9.3141-3144.1993
Comparison and genomic sizing of Escherichia coli O157:H7 isolates by pulsed-field gel electrophoresis
Abstract
Genomic DNAs of Escherichia coli O157:H7 strains isolated from patients and food samples were analyzed by pulsed-field gel electrophoresis. The rare-cutting endonucleases SfiI and XbaI generated 6 and 10 distinct genomic profiles, respectively, for the 22 strains analyzed, indicating that this technique may find application for epidemiologic studies. Summation of XbaI fragments from five E. coli O157:H7 strains estimated the genomic length at ca. 4.7 Mb.
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