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    Apr 19, 2021
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    Acquisition of virulence genes by a carrier strain gave rise to the ongoing epidemics of meningococcal disease in West Africa

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    Brynildsrud et al - 2018 - ...
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    Authors
    Brynildsrud, OB
    Eldholm, V
    Bohlin, J
    Uadiale, K
    Obaro, S
    Caugant, DA
    Issue Date
    2018-05-07
    Submitted date
    2018-05-18
    
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    Journal
    Proceedings of the National Academy of Sciences of the United States of America
    Abstract
    In the African meningitis belt, a region of sub-Saharan Africa comprising 22 countries from Senegal in the west to Ethiopia in the east, large epidemics of serogroup A meningococcal meningitis have occurred periodically. After gradual introduction from 2010 of mass vaccination with a monovalent meningococcal A conjugate vaccine, serogroup A epidemics have been eliminated. Starting in 2013, the northwestern part of Nigeria has been affected by yearly outbreaks of meningitis caused by a novel strain of serogroup C Neisseria meningitidis (NmC). In 2015, the strain spread to the neighboring country Niger, where it caused a severe epidemic. Following a relative calm in 2016, the largest ever recorded epidemic of NmC broke out in Nigeria in 2017. Here, we describe the recent evolution of this new outbreak strain and show how the acquisition of capsule genes and virulence factors by a strain previously circulating asymptomatically in the African population led to the emergence of a virulent pathogen. This study illustrates the power of long-read whole-genome sequencing, combined with Illumina sequencing, for high-resolution epidemiological investigations.
    Publisher
    National Academy of Sciences
    URI
    http://hdl.handle.net/10144/619162
    DOI
    10.1073/pnas.1802298115
    PubMed ID
    29735685
    Language
    en
    ISSN
    1091-6490
    ae974a485f413a2113503eed53cd6c53
    10.1073/pnas.1802298115
    Scopus Count
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    Other Diseases

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