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Journal of Clinical Microbiology, 07 1996, 1686-1690, Vol 34, No. 7
S Patel, S Wall and NA Saunders
A heminested inverse PCR (HIP) for the amplification of sequences flanking
the Mycobacterium tuberculosis insertion sequence IS6110 has been
developed. The method depends upon primers that anneal to IS6110 at sites
between its 5' end and the closest BsrFI site. The accuracy of HIP was
demonstrated by the amplification of sequences within plasmid constructs
carrying one or two copies of the insertion sequence IS986 in different
orientations. The identities of the amplicons produced from strains
carrying a single copy of IS6110 were verified by nucleotide sequencing.
Analyses of 204 M. tuberculosis strains including those involved in
outbreaks showed that IS6110 HIP is highly discriminatory and reproducible.
HIP fingerprinting of these 204 strains generated 136 distinct types, and
its discriminatory power was equivalent to that of standard restriction
fragment length polymorphism analysis. The method is therefore of value for
the rapid fingerprinting of M. tuberculosis strains for epidemiological
purposes.
Copyright © 1996 by the American Society for Microbiology. All rights reserved.
Heminested inverse PCR for IS6110 fingerprinting of Mycobacterium tuberculosis strains
Molecular Biology Unit, Central Public Health Laboratory, London, United Kingdom.
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