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Evaluation of Immune Risk Factors for Developing Complications After Bacterial Meningitis in Children

Anna Kadziszewska1,2, Ewelina Gowin1,2

  • 1Department of Preventive Health, Poznan University of Medical Science, Poznan, Poland.

Journal of Child Neurology
|September 16, 2025
PubMed

Insights

Children with bacterial meningitis face significant risks of long-term complications. Immune system factors, including complement activity and genetic variations, appear to influence these outcomes, highlighting potential prognostic indicators.

Area of Science:

  • Immunology
  • Genetics
  • Pediatrics

Background:

  • Bacterial meningitis can lead to severe postinfectious complications in children.
  • Understanding the interplay between immune response and genetic factors is crucial for predicting outcomes.

Purpose of the Study:

  • To investigate immune system components and single-nucleotide polymorphisms (SNPs) in children after bacterial meningitis.
  • To identify potential roles of these factors in the development of postinfectious complications.

Main Methods:

  • Analysis of leukocyte profiles, immunoglobulin levels (IgA, IgM, IgG), and complement activity (C3, C4, CH50) in 47 children.
  • Genotyping for 11 SNPs across 7 immune response genes.
  • Collection of complication data from medical records, follow-ups, and surveys.

Main Results:

  • Complications occurred in 59.6% of cases, including cognitive impairment, neurologic deficits, and hearing disorders.
  • A trend towards increased neurologic complications was observed with CH50 defects (P=.064).
  • The TIRAP rs8177374 SNP showed a borderline trend toward significance (P=.054).

Conclusions:

  • Bacterial meningitis is associated with a high incidence of long-term complications.
  • Complement system disturbances and specific genetic predispositions are significant prognostic factors.
  • Further research into immune and genetic factors may improve prediction and management of post-meningitis complications.

Keywords:
innate immunitymeningitismeningococcineurologic complicationspneumococci

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