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Response to pneumococcal immunization in children with and without recurrent infections

H Silk1, J Zora, J Goldstein

  • 1Atlanta Allergy and Asthma Clinic, Georgia 30328, USA.

The Journal of Asthma : Official Journal of the Association for the Care of Asthma
|March 26, 1998
PubMed

Insights

Children with recurrent sinopulmonary infections show a weaker antibody response to pneumococcal vaccines compared to healthy children. This highlights a potential gap in vaccine effectiveness for this vulnerable population.

Area of Science:

  • Immunology
  • Pediatrics
  • Vaccinology

Background:

  • Children with recurrent sinopulmonary infections often have impaired immune responses.
  • Previous studies lacked controlled comparisons of pneumococcal vaccine response in these children versus healthy controls.

Purpose of the Study:

  • To compare the humoral immune response to pneumococcal immunization in children with recurrent sinopulmonary infections versus healthy controls.
  • To evaluate antibody titers against specific pneumococcal serotypes post-vaccination.

Main Methods:

  • Immunological evaluation of 66 children (2-5 years) with recurrent infections and 28 healthy controls.
  • Administration of 23-valent pneumococcal vaccine to both groups.
  • Measurement of antibody titers to 12 pneumococcal serotypes via radioimmunoassay before and 4 weeks after immunization.

Main Results:

  • Healthy controls exhibited significantly higher pre- and post-immunization antibody titers compared to children with recurrent infections (p < .05).
  • Controls responded to more serotypes (7.71 vs. 5.1, p < .05) and achieved adequate titers more frequently.
  • A significant percentage of children with recurrent infections failed to mount an adequate serotype-specific antibody response.

Conclusions:

  • The 23-valent pneumococcal vaccine is immunogenic in young, healthy children.
  • Children with recurrent sinopulmonary infections demonstrate a diminished capacity to produce adequate serotype-specific antibodies after pneumococcal immunization.
  • Findings suggest potential limitations in vaccine efficacy for children with recurrent respiratory infections.

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