Gene polymorphisms of IL-17A and bacterial meningitis in Angolan children

Johanna Teräsjärvi, Elina Tenhu, Manuel Leite Cruzeiro, Okko Savonius, Emilie Rugemalira, Qiushui He, Tuula Pelkonen

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Interleukin (IL)-17 A plays a crucial role in protecting hosts from invading bacterial pathogens. In this study, we investigated if single nucleotide polymorphisms (SNPs) in IL-17A are associated with susceptibility and outcome of bacterial meningitis (BM) in Angolan children. The study sample comprised 241 confirmed BM patients and 265 controls, which were matched for age and ethnicity. Three IL-17A SNPs – rs2275913 (−197G > A), rs8193036 (-737C > T) and rs4711998 (−877 A > G) – were determined by high-resolution melting analysis (HRMA). The frequency of variant genotype rs4711998 was significantly higher in patients with BM caused by Haemophilus influenzae (odds ratio [OR] 3.5; 95% confidence interval [CI] 1.49–8.23; P = 0.0025) than in controls. Also, patients with BM caused by Gram-negative bacteria and who carried the variant genotype rs2275913 had a lower glucose level (P = 0.0051) in cerebrospinal fluid (CSF). Patients with BM caused by Streptococcus pneumoniae who carried the variant type rs8193036 had a reduced risk for severe neurological sequelae (OR: 0.14; 95% CI: 0.029–0.68; P = 0.0079), blindness (OR: 0.012; 95% CI: 0.012–0.87; P = 0.017) and ataxia (OR: 0.28; 95% CI: 0.091–0.83; P = 0.023). This study suggests an association of IL-17A genetic variations with susceptibility and outcome of bacterial meningitis in Angolan children.

Original languageEnglish
Article number105553
JournalInfection, genetics and evolution
Number of pages7
Publication statusPublished - Mar 2024
MoE publication typeA1 Journal article-refereed

Bibliographical note

Publisher Copyright:
© 2024 The Author(s)

Fields of Science

  • Bacterial meningitis
  • Haemophilus influenzae
  • IL-17
  • Meningitis
  • Polymorphisms
  • Streptococcus pneumoniae
  • 3123 Gynaecology and paediatrics

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