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Journal of Clinical Microbiology, Mar 1995, 589-595, Vol 33, No. 3
D Liveris, A Gazumyan and I Schwartz
The etiologic agent of Lyme borreliosis, Borrelia burgdorferi sensu lato,
has been isolated from many biologic sources in North America and Eurasia,
and isolates have been divided into three distinct genospecies (B.
burgdorferi sensu stricto, Borrelia garinii, and Borrelia afzelii). In
order to explore the possible association of genospecies with disease
manifestation, 60 isolates of B. burgdorferi sensu lato were subjected to
5S rDNA-linked restriction fragment length polymorphism (RFLP) analysis.
The results confirmed earlier studies which indicated that virtually all
North American isolates are B. burgdorferi sensu stricto, whereas Eurasian
strains fall into all three genospecies. Thirty-five isolates were further
characterized by PCR amplification of a region of the 16S-23S rDNA spacer
and HinfI digestion of the products. This method resulted in the
subdivision of B. burgdorferi sensu stricto into two distinct PCR-RFLP
types. In contrast, B. garinii isolates all displayed an identical pattern.
Additionally, a number of previously unclassified North American isolates
(25015, DN127, 19857, 24330) showed distinctively different PCR-RFLP
patterns. The application of this method for the typing of uncultured B.
burgdorferi directly in biologic samples was demonstrated by analysis of
several field-collected Ixodes scapularis tick specimens. The described
PCR- RFLP technique should allow for the direct and rapid molecular typing
of B. burgdorferi-containing samples and facilitate studies of the
relationship between spirochete genotype and clinical disease.
Copyright © 1995 by the American Society for Microbiology. All rights reserved.
Molecular typing of Borrelia burgdorferi sensu lato by PCR-restriction fragment length polymorphism analysis
Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla 10595, USA.
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