Abstract
After a primary series of 3 doses, it was found that a 9-valent pneumococcal conjugate vaccine no longer reduces nasopharyngeal colonization by vaccine serotypes in children 5.3 years of age. In addition, human immunodeficiency virus (HIV)-infected children (n=81) had a higher prevalence of colonization by Streptococcus pneumoniae and Haemophilus influenzae (71.6\% and 74.1\%, respectively) than did HIV-uninfected children (n=271; 50.9\% and 52.0\%, respectively), suggesting that increased colonization may contribute to the greater burden of pneumococcal disease in HIV-infected children. Inverse associations between colonization by S. pneumoniae and colonization by Staphylococcus aureus and between colonization by S. aureus and colonization by H. influenzae were observed only in HIV-uninfected children, possibly as a result of suboptimal adaptive immunity after previous colonization in HIV-infected children.
- aureus,
- child,
- conjugate
- factors,
- female,
- haemophilus
- humans,
- infections,
- influenzae,
- male,
- nasopharynx,
- opportunistic
- pneumococcal
- pneumoniae,
- preschool,
- prevalence,
- seronegativity,
- staphylococcal
- staphylococcus
- streptococcus
- time
- vaccines,
- {aids-related}
- {hiv}
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