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Risk Factors for Pneumococcal Colonization of the Nasopharynx in Alaska Native Adults and Children
  • Published Date:
    November 13 2013
  • Source:
    J Pediatric Infect Dis Soc. 3(2):104-111
  • Language:
    English
Filetype[PDF-457.72 KB]


Details:
  • Alternative Title:
    J Pediatric Infect Dis Soc
  • Description:
    Background.

    Alaska Native children have high invasive pneumococcal disease (IPD) rates, and lack of in-home running water has been shown to have a significant association with infection. Pneumococcal conjugate vaccines reduced IPD; however, this population saw substantial replacement disease and colonization with nonvaccine serotypes. We evaluated risk factors for nasopharyngeal pneumococcal colonization in Alaska Native adults and children.

    Methods.

    We conducted annual surveys from 2008 through 2011 of residents of all ages in 8 rural Alaskan villages. Interviews were conducted, medical charts were reviewed, and nasopharyngeal swabs were cultured for Streptococcus pneumoniae. Multivariate logistic regression models were developed for 3 age groups (under 10 years, 10–17 years, and 18 years and older) to determine risk factors for colonization.

    Results.

    We obtained 12 535 nasopharyngeal swabs from 4980 participants. Our population lived in severely crowded conditions, and 48% of households lacked in-home running water. In children <10 years, colonization was associated with lack of in-home running water, household crowding, and more children in the home. Pneumococcal vaccination status was not associated with colonization. In older children and adults, increased number of persons in the household was associated with pneumococcal colonization.

    Conclusions.

    Higher colonization prevalence may partially explain increased IPD rates seen in those lacking in-home water services. Improving availability of sanitation services and reducing household crowding may reduce the burden of IPD in this population.

  • Pubmed ID:
    26625363
  • Pubmed Central ID:
    PMC6924510
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