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Progress in the prevention of otitis media through immunization
1National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, Maryland, USA. jsnow@crosslink.net
Summary
Effective vaccines against acute otitis media are progressing. Development of multivalent vaccines for pneumococcus, nontypeable Haemophilus influenzae (NTHi), and Moraxella catarrhalis is anticipated within ten years.
Area of Science:
- Medical microbiology
- Vaccinology
- Pediatric infectious diseases
Background:
- Acute otitis media (AOM) is a common childhood infection.
- Bacterial pathogens like Streptococcus pneumoniae, nontypeable Haemophilus influenzae (NTHi), and Moraxella catarrhalis are primary causes of AOM.
- Effective vaccines are crucial for preventing AOM and its complications.
Purpose of the Study:
- To review the progress in developing vaccines against major bacterial pathogens causing AOM.
- To assess the current state of vaccine candidates for AOM prevention.
Main Methods:
- Literature review utilizing MEDLINE database.
- Search terms included "otitis media" and "otitis media vaccine".
- Data synthesized from clinical trials and laboratory studies.
Main Results:
- The heptavalent pneumococcal conjugate vaccine (Prevnar) showed modest reductions in overall AOM incidence (6-7%).
- For pneumococcal-associated AOM, efficacy reached 66.7% with a 34% incidence reduction.
- Promising preclinical data exists for conjugated vaccines against NTHi and M. catarrhalis, demonstrating immunogenicity and protective effects in animal models.
Conclusions:
- Multivalent vaccines targeting Streptococcus pneumoniae, NTHi, and M. catarrhalis are likely necessary for comprehensive AOM prevention.
- Development of these advanced vaccines is feasible within the next decade.