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Distribution of surface-protein variants of hyperinvasive meningococci in China

Li Yang1, Xiaobing Zhang, Junping Peng

  • 1State Key Laboratory for Molecular Virology and Genetic Engineering, Institute of Pathogen Biology, Chinese Academy of Medical Sciences, Beijing, China.

The Journal of Infection
|March 28, 2009
PubMed
Abstract

Insights

This study analyzed FetA and PorB types in invasive meningococci from China, finding novel variants and specific combinations linked to disease-causing clones. These findings aid in monitoring and understanding meningococcal epidemiology.

Area of Science:

  • Microbiology
  • Epidemiology
  • Genetics

Background:

  • Limited data exists on FetA and PorB types of circulating meningococci globally.
  • Understanding these antigen types is crucial for tracking Neisseria meningitidis strains.

Purpose of the Study:

  • To investigate the distribution of FetA and PorB variable region (VR) types in hyperinvasive meningococcal lineages in China.
  • To identify novel antigen variants and their association with specific clonal complexes.

Main Methods:

  • Genotypic analysis of 201 Neisseria meningitidis strains.
  • Isolation of strains from China spanning 1956-2006.
  • Characterization of FetA and PorB variable region types.

Main Results:

  • Sixteen PorB types identified, including 8 novel ones.
  • 24 FetA VR types found, with 3 being novel.
  • Specific FetA and PorB combinations were associated with distinct clonal complexes.
  • Five dominant clones were responsible for most invasive disease cases.

Conclusions:

  • Antigen-gene variants and their combinations show broad distribution, but some invasive clones are time-specific.
  • Emerging strain changes and clone replacement highlight evolving meningococcal epidemiology in China.
  • Findings are vital for public health surveillance and further research on Neisseria meningitidis.

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