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Nucleic Acids Res. Dec 25, 1993; 21(25): 5930–5933.
PMCID: PMC310476

RAPD (arbitrary primer) PCR is more sensitive than multilocus enzyme electrophoresis for distinguishing related bacterial strains.

Abstract

The RAPD (random amplified polymorphic DNA) fingerprinting method, which utilizes low stringency PCR amplification with single primers of arbitrary sequence to generate strain-specific arrays of anonymous DNA fragments, was calibrated relative to the widely used, protein-based multilocus enzyme electrophoretic (MLEE) typing method. RAPD fingerprinting was carried out on five isolates from each of 15 major groups of Escherichia coli strains that cause diarrheal disease worldwide (75 isolates in all). Each group consisted of isolates that were not distinguishable from one another by MLEE typing using 20 diagnostic enzyme markers. In our RAPD tests, three or more distinct subgroups in each MLEE group were distinguished with each of five primers, and 74 of the 75 isolates were distinguished when data obtained with five primers were combined. Thus, RAPD typing is far more sensitive than MLEE typing for discriminating among related strains of a species. Despite their different sensitivities, the same general relationships among strains were inferred from MLEE and RAPD data. Thus, our results recommend use of the RAPD method for studies of bacterial population genetic structure and evolution, as well as for epidemiology.

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Selected References

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