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Journal of Clinical Microbiology, 10 1996, 2469-2474, Vol 34, No. 10
RA Skuce, D Brittain, MS Hughes and SD Neill
The insertion sequence IS6110 and the direct repeat (DR) specific to
tuberculosis complex mycobacteria and the highly repeated DNA sequence, the
polymorphic GC-rich repeat sequence (PGRS), were systematically used to
identify restriction fragment length polymorphisms (RFLPs) within 210
isolates of Mycobacterium bovis. The isolates were primarily of bovine
origin, but isolates from badgers, feral deer, sheep, humans, and a pig
were included. The RFLP probes IS6110, DR, and PGRS individually identified
17, 18, and 18 different RFLP types, respectively, but in combination these
probes identified a total of 39 different M. bovis RFLP types. The
recommendations (J. D. A. van Embden, M. D. Cave, J. T. Crawford, J. W.
Dale, K. D. Eisenach, B. Gicquel, P. W. M. Hermans, C. Martin, R. McAdam,
T. M. Shinnick, and P. M. Small, J. Clin. Microbiol. 31:406-409, 1993) for
a standardized RFLP analysis for M. tuberculosis were adapted to facilitate
gel documentation, image analysis, and construction of a database of RFLP
types. In the present study the same M. bovis RFLP types were evident in
the various animal species included, indicating that the strains were not
host restricted. Application of these techniques to defined field studies
should help elucidate more accurately aspects of the epidemiology of bovine
tuberculosis in different countries.
Copyright © 1996 by the American Society for Microbiology. All rights reserved.
Differentiation of Mycobacterium bovis isolates from animals by DNA typing
Department of Agriculture for Northern Ireland, Belfast, United Kingdom. RSKUCE@QUB.AC.UK
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