title: Investigation of risk factors for penicillin-resistant Streptococcus pneumoniae carriage in Turkish children.
abstract: BACKGROUND
  Nasopharyngeal colonization plays an important role for infections caused by Streptococcus pneumoniae. Emergence of penicillin resistance in this organism has made it difficult to treat pneumococcal infections. The objectives of this study were to investigate the risk factors for nasopharyngeal colonization with S. pneumonia and for nasopharyngeal colonization with penicillin-resistant S. pneumoniae.
  
  
  METHODS
  Three hundred children with or without evidence of infection were investigated for various risk factors. Streptococcus pneumoniae isolated from children's nasopharyngeal swabs were examined for penicillin susceptibility.
  
  
  RESULTS
  Day-care attendance (odds ratio OR=2.82, P=0.003) and upper respiratory tract infection within the last month (OR=1.83, P=0.02), have been determined to be risk factors for S. pneumoniae carriage. The use of antibiotics within the last 3 months (OR=81.07, P<0.001), the presence of more than five people living in the house of the child (OR=6.63, P=0.03), and having a sibling under 5-years-old (OR=4.60, P=0.03) have been determined to be risk factors for penicillin-resistant S. pneumoniae carriage.
  
  
  CONCLUSIONS
  Some children are inevitably exposed to and colonized with penicillin susceptible or resistant S. pneumoniae. Changes in day-care organizations, better living conditions, and restriction of antibiotic use seems to be useful precautions to prevent the emerging and colonization with penicillin-susceptible or -resistant S. pneumoniae.
authors.affiliation: Ankara University Medical School, Department of Paediatrics, Ankara, Turkey. erginciftci@doctor.com
authors.forename: E
authors.initials: E
authors.lastname: Ciftçi
authors.forename: U
authors.initials: U
authors.lastname: Doğru
authors.forename: D
authors.initials: D
authors.lastname: Aysev
authors.forename: E
authors.initials: E
authors.lastname: Ince
authors.forename: H
authors.initials: H
authors.lastname: Güriz
authors.forename: U D
authors.initials: UD
authors.lastname: Aysev
mesh_terms: D002353:Carrier State; D002648:Child; D002656:Child Day Care Centers; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D010403:Penicillin Resistance; D011008:Pneumococcal Infections / Q000453:epidemiology*; D012307:Risk Factors; D014421:Turkey / Q000453:epidemiology