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Title: Genomic Analysis of Serogroup Y Neisseria meningitidis Isolates Reveals Extensive Similarities Between Carriage and Disease-Associated Organisms
Authors: Oldfield, N. J.
Harrison, O. B.
Bayliss, Christopher David
Maiden, M. C.
Ala'Aldeen, D. A.
Turner, D. P.
First Published: 7-Jan-2016
Publisher: Oxford University Press (OUP)
Citation: Journal of Infectious Diseases, 2016 (Online First)
Abstract: BACKGROUND:  Neisseria meningitidis is a frequent colonizer of the human nasopharynx with asymptomatic carriage providing the reservoir for invasive, disease-causing strains. Serogroup Y (MenY) strains are a major cause of meningococcal disease. High resolution genetic analyses of carriage and disease isolates can establish epidemiological relationships and identify potential virulence factors. METHODS:  Whole genome sequence data were obtained from UK MenY carriage isolates from 1997-2010 (n=99). Sequences were compared to those from MenY invasive isolates from 2010 and 2011 (n=73) using a gene-by-gene approach. RESULTS:  Comparisons across 1,605 core genes resolved 91% of isolates into one of eight clusters containing closely related disease and carriage isolates. Six clusters contained carried meningococci isolated in 1997-2001 suggesting temporal stability. One cluster of isolates, predominately sharing the designation Y: P1.5-1,10-1: F4-1: ST-1655 (cc23), was resolved into a sub-cluster with 86% carriage isolates and a second with 90% invasive isolates. These sub-clusters were defined by specific allelic differences in five core genes encoding glycerate kinase (glxK), valine-pyruvate transaminase (avtA), superoxide dismutase (sodB) and two hypothetical proteins. CONCLUSIONS:  High resolution genetic analyses detected long-term temporal stability and temporally-overlapping carriage and disease populations for MenY clones but also evidence of a disease-associated clone.
DOI Link: 10.1093/infdis/jiw008
ISSN: 0022-1899
eISSN: 1537-6613
Version: Post-print
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © The Author 2016. Published by Oxford University Press for the Infectious Diseases Society of America. All rights reserved. For permissions, e-mail This is a pre-copyedited, author-produced PDF of an article accepted for publication in Journal of Infectious Diseases following peer review. The version of record J Infect Dis. (2016) doi: 10.1093/infdis/jiw008 is available online at:
Description: The file associated with this record is under a 12-month embargo from publication in accordance with the publisher's self-archiving policy. The full text may be available through the publisher links provided above.
Appears in Collections:Published Articles, Dept. of Genetics

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