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Journal of Clinical Microbiology, 07 1997, 1769-1771, Vol 35, No. 7
TD McHugh, LE Newport and SH Gillespie
We have previously demonstrated homology between a 181-bp fragment of
IS6110 and DNA from mycobacteria other than tuberculosis-causing
mycobacteria (MOTT). Genomic DNA from 14 strains of MOTT was digested with
PvuII and was hybridized with a probe derived from the 181-bp fragment and
the INS1/INS2 international standard probe at high stringency. Multiple
banding patterns were obtained from isolates of M. avium-M. intracellulare,
M. fortuitum, M. kansasii, and M. malmoense. Differences in the banding
patterns between and within species were obtained. This suggests that
mycobacteria possess a family of IS3-like elements. The species of isolates
suspected of being M. tuberculosis must be carefully determined before
IS6110 restriction fragment length polymorphism analysis, and caution must
be used in designing and evaluating diagnostic PCR tests based on this
element.
Copyright © 1997 by the American Society for Microbiology. All rights reserved.
IS6110 homologs are present in multiple copies in mycobacteria other than tuberculosis-causing mycobacteria
Department of Medical Microbiology, Royal Free Hospital School of Medicine, London, United Kingdom.
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