Outbreak of Serotype 1 Invasive Pneumococcal Disease, Kibera Urban Informal Settlement, Nairobi, Kenya, 2023

Emerg Infect Dis. 2025 Feb;31(2):345-349. doi: 10.3201/eid3102.241652.

Abstract

Use of 10-valent pneumococcal conjugate vaccine in Kenya has led to substantial reductions in vaccine-type pneumococcal carriage and invasive pneumococcal disease. However, analysis of recent surveillance data indicates an outbreak of vaccine-type serotype 1 in 2023 in Kibera, Kenya. Continued monitoring of invasive pneumococcal disease in Kenya is warranted.

Keywords: 10-valent pneumococcal vaccine; Kenya; Kibera; Nairobi; Streptococci; Streptococcus pneumoniae; bacteria; outbreak; pneumococcal diseases; respiratory infections; vaccines.

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Child
  • Child, Preschool
  • Disease Outbreaks*
  • Female
  • Humans
  • Infant
  • Kenya / epidemiology
  • Male
  • Middle Aged
  • Pneumococcal Infections* / epidemiology
  • Pneumococcal Infections* / microbiology
  • Pneumococcal Infections* / prevention & control
  • Pneumococcal Vaccines / immunology
  • Serogroup
  • Streptococcus pneumoniae* / classification
  • Streptococcus pneumoniae* / immunology
  • Young Adult

Substances

  • Pneumococcal Vaccines