[Prevalence of potentially pathogenic bacteria in nasopharynx of healthy children attending a day care center in Havana City]

Rev Cubana Med Trop. 2006 Sep-Dec;58(3):181-9.
[Article in Spanish]


During the first six-month period of 2001, a descriptive cross-sectional study of carriage in healthy children attending a day-care center in Havana City was performed. The objective was to find out the prevalence of potentially pathogenic bacteria and its association with possible risk factors. The design took into account the international and domestic regulatory bioethical requirements. Swabs of posterior nasopharynx of 160 children were directly cultured in brain heart agar plus sheep blood and in brain heart agar plus NAD, hemine and bacitracin and incubated for 18-24 h. Resulting isolates were identified using conventional techniques and the API NH system. Male children aged 3-4 years were predominant. A high percentage of nasopharyngeal carriage was detected; Haemophilus was isolated in 92.50% of cases, being Haemophilus influenzae present in 54.72% of children. Other pathogens were Streptococcus pneumoniae, beta-hemolythic Streptococcus, Staphylococcus aureus and Moraxella catarrhalis. A statistically significant difference was observed when comparing S. pneumoniae carriage and non-carriage in less than 2 years-old children. The colonizing patterns of potentially pathogenic bacteria were disclosed in children attending a day care center in Havana City.

MeSH terms

  • Bacterial Vaccines
  • Carrier State / epidemiology*
  • Carrier State / microbiology
  • Child
  • Child Day Care Centers*
  • Child, Preschool
  • Comorbidity
  • Cross-Sectional Studies
  • Crowding
  • Cuba / epidemiology
  • Female
  • Haemophilus Infections / epidemiology*
  • Haemophilus Infections / microbiology
  • Haemophilus influenzae / isolation & purification
  • Humans
  • Infant
  • Male
  • Moraxella catarrhalis / isolation & purification
  • Moraxellaceae Infections / epidemiology
  • Moraxellaceae Infections / microbiology
  • Nasopharynx / microbiology*
  • Pneumococcal Infections / epidemiology
  • Pneumococcal Infections / microbiology
  • Prevalence
  • Respiratory Tract Infections / epidemiology
  • Risk Factors
  • Staphylococcal Infections / epidemiology
  • Staphylococcal Infections / microbiology
  • Streptococcal Infections / epidemiology*
  • Streptococcal Infections / microbiology
  • Streptococcus pyogenes / isolation & purification
  • Tobacco Smoke Pollution / statistics & numerical data
  • Urban Population


  • Bacterial Vaccines
  • Tobacco Smoke Pollution