Clonal analysis of meningococci during a 26 year period prior to the introduction of meningococcal serogroup C vaccines

Sullivan, C. B., Diggle, M. A., Davies, R. L. and Clarke, S. C. (2015) Clonal analysis of meningococci during a 26 year period prior to the introduction of meningococcal serogroup C vaccines. PLoS ONE, 10(a), e115741. (doi: 10.1371/journal.pone.0115741) (PMID:25615448) (PMCID:PMC4304704)

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Meningococcal disease remains a public health burden in the UK and elsewhere. Invasive Neisseria meningitidis, isolated in Scotland between 1972 and 1998, were characterised retrospectively to examine the serogroup and clonal structure of the circulating population. 2607 isolates causing invasive disease were available for serogroup and MLST analysis whilst 2517 were available for multilocus sequence typing (MLST) analysis only. Serogroup distribution changed from year to year but serogroups B and C were dominant throughout. Serogroup B was dominant throughout the 1970s and early 1980s until serogroup C became dominant during the mid-1980s. The increase in serogroup C was not associated with one particular sequence type (ST) but was associated with a number of STs, including ST-8, ST-11, ST-206 and ST-334. This is in contrast to the increase in serogroup C disease seen in the 1990s that was due to expansion of the ST-11 clonal complex. While there was considerable diversity among the isolates (309 different STs among the 2607 isolates), a large proportion of isolates (59.9%) were associated with only 10 STs. These data highlight meningococcal diversity over time and the need for ongoing surveillance during the introduction of new meningococcal vaccines.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Davies, Dr Robert
Authors: Sullivan, C. B., Diggle, M. A., Davies, R. L., and Clarke, S. C.
College/School:College of Medical Veterinary and Life Sciences > School of Infection & Immunity
Journal Name:PLoS ONE
Publisher:Public Library of Science
ISSN (Online):1932-6203
Copyright Holders:Copyright © 2015 The Authors
First Published:First published in PLoS ONE 10(1):e115741
Publisher Policy:Reproduced under a Creative Commons License

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