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Journal of Clinical Microbiology, 10 1996, 2613-2615, Vol 34, No. 10
A Pillay, AA Hoosen, P Kiepiela and AW Sturm
Local strains of Haemophilus ducreyi were characterized by ribosomal DNA
fingerprinting in order to develop a typing scheme for this organism.
Chromosomal DNAs from 30 strains were extracted, and restriction fragments
were separated by agarose gel electrophoresis after cleavage with BglII,
HindIII, HindII, and BstEII. Of the 30 local strains studied, nine BglII,
eight HindIII, six HindII, and five BstEII ribotype patterns were observed.
In order to develop a typing scheme, we correlated the ribotype patterns
obtained with each of the four enzymes for each strain. By this scheme, 13
ribotypes designated b to n were defined among the local strains. This
study demonstrates that there is a diversity of ribotypes among H. ducreyi
strains in our area, which emphasizes that there are many strains
responsible for chancroid. This novel typing scheme provides a useful tool
for further epidemiological studies of chancroid.
Copyright © 1996 by the American Society for Microbiology. All rights reserved.
Ribosomal DNA typing of Haemophilus ducreyi strains: proposal for a novel typing scheme
Department of Medical Microbiology, Faculty of Medicine, University of Natal, Congella, Durban, South Africa. Pillaya@med.und.ac.za
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