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Journal of Clinical Microbiology, 06 1995, 1606-1612, Vol 33, No. 6
PW Hermans, M Sluijter, T Hoogenboezem, H Heersma, A van Belkum and R de Groot
The aim of this study was to identify the strengths and weaknesses of five
DNA fingerprint methods for epidemiological typing of Streptococcus
pneumoniae. We investigated the usefulness of (i) ribotyping, (ii) BOX
fingerprinting with the BOX repetitive sequence of S. pneumoniae as a DNA
probe, (iii) PCR fingerprinting with a primer homologous to the
enterobacterial repetitive intergenic consensus sequence, (iv) pulsed-field
gel electrophoresis of large DNA fragments, and (v) restriction fragment
end labeling to detect restriction fragment length polymorphism of small
DNA fragments. Twenty-eight S. pneumoniae strains isolated from the blood
and/or cerebrospinal fluid of 21 patients were analyzed. Genetic clustering
among the 28 strains was independent of the DNA fingerprint technique used.
However, the discriminatory power and the similarity values differed
significantly among the individual techniques. BOX fingerprinting,
pulsed-field gel electrophoresis, and restriction fragment end labeling
provided the highest degree of discriminatory power. Furthermore, the ease
with which computerized fingerprint analysis could be conducted also varied
significantly among the techniques. Ribotyping, BOX fingerprinting, and
restriction fragment end labeling were very suitable techniques for
accurate computerized data analysis. Because of their high discriminatory
potential and ease of accurate analysis, we conclude that BOX
fingerprinting and restriction fragment end labeling are the most suitable
techniques to type pneumococcal strains.
Copyright © 1995 by the American Society for Microbiology. All rights reserved.
Comparative study of five different DNA fingerprint techniques for molecular typing of Streptococcus pneumoniae strains
Department of Pediatrics, University Hospital Rotterdam, Erasmus University Rotterdam, The Netherlands.
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