ArticleThe American journal of tropical medicine and hygiene2025
Pneumococcal Carriage in the Sahel Region of Burkina Faso before a 13-Valent Pneumococcal Conjugate Vaccination Campaign.
Article in The American journal of tropical medicine and hygiene, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Burkina Faso introduced 13-valent pneumococcal conjugate vaccine (PCV13) in 2013 and achieved >90% three-dose coverage. Recently, the Sahel Region has experienced a security crisis, resulting in decreasing PCV13 coverage. We examined pneumococcal carriage before a mass PCV13 campaign in the Sahel Region in 2022. In January and February 2022, we conducted a cross-sectional, age-stratified pneumococcal carriage study among healthy individuals in Dori, the capital of the Sahel Region. We collected nasopharyngeal (all participants) and oropharyngeal swabs (participants 5 years old and older). Pneumococci isolated by culture were serotyped by polymerase chain reaction and/or Quellung. We evaluated overall and vaccine serotype pneumococcal carriage prevalence by age group. Among 1,079 participants, overall pneumococcal carriage prevalence was 57.2%; carriage was highest in children 1 year old (71.8%) and 1-11 months old (69.7%) and lowest in participants 15 years old or older (30.0%). Vaccine serotype carriage prevalence was 12.8%, ranging from 5.6% in participants 15 years old or older to 17.8% in children 5-14 years old. PCV13 vaccination history was unknown for 59.6% of age-eligible children. Among children with card-confirmed or verbally reported PCV13 history, most (99.0%) had no history of PCV13 receipt. Eight years after PCV13 introduction and in a conflict-affected area with declining PCV13 coverage, more than 1 in 10 children and 1 in 20 participants 15 years old or older are colonized with a vaccine serotype. These results will be used to evaluate the mass PCV13 campaign impact and help inform policy surrounding pneumococcal conjugate vaccine use during humanitarian crises.
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