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The population structure of Mycobacterium bovis in Great Britain: Clonal expansion

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Smith, Noel H., Dale, James, Inwald, Jacqueline, Palmer, Si, Gordon, Stephen V., Hewinson, R. Glyn, Smith, John Maynard·2003·Proceedings of the National Academy of Sciences

Abstract

We have analyzed 11,500 isolates of Mycobacterium bovis (the cause of tuberculosis in cattle and other mammals) isolated in Great Britain (England, Wales and Scotland)] and characterized by spoligotype. Genetic exchange between cells is rare or absent in strains of the Mycobacterium tuberculosis complex so that, by using spoligotypes, it is possible to recognize “clones” with a recent common ancestor. The distribution of variable numbers of tandem repeats types in the most common clone in the data set is incompatible with random mutation and drift. The most plausible explanation is a series of “clonal expansions,” and this interpretation is supported by the geographical distribution of different genotypes. We suggest that the clonal expansion of a genotype is caused either by the spread of a favorable mutation, together with all other genes present in the ancestral cell in which the mutation occurred, or by the invasion of a novel geographical region by a limited number of genotypes. A similar pattern is observed in M. tuberculosis (the main cause of tuberculosis in humans). The significance of clonal expansion in other bacteria that have recombination is discussed.

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Metadata

Authors
Smith, N. H., Dale, J., Inwald, J., Palmer, S., Gordon, S. V., Hewinson, R. G., & Smith, J. M.
Venue
Proceedings of the National Academy of Sciences
Published
2003-12
Volume
100
Issue
25
Pages
15271-15275
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2044692417
Cited by
158
References
2
FWCI
6.52
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: The population structure of Mycobacterium bovis in Great Britain: Clonal expansion. https://app.cochat.ai/papers/10.1073/pnas.2036554100
The paper
Smith, N. H., Dale, J., Inwald, J., Palmer, S., Gordon, S. V., Hewinson, R. G., & Smith, J. M. (2003). The population structure of Mycobacterium bovis in Great Britain: Clonal expansion. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.2036554100

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