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Assessing Respiratory Immune Responses to Haemophilus Influenzae
06:32

Assessing Respiratory Immune Responses to Haemophilus Influenzae

Published on: June 29, 2021

Potential contribution by nontypable Haemophilus influenzae in protracted and recurrent acute otitis media

Galia Barkai1, Eugene Leibovitz, Noga Givon-Lavi

  • 1Soroka University Medical Center, Beer-Sheva, Israel.

The Pediatric Infectious Disease Journal
|June 9, 2009
PubMed
Abstract

Insights

Nontypable Haemophilus influenzae (NTHi) acute otitis media (AOM) is more common in winter, recurs frequently, and is linked to prior antibiotic use. These factors suggest NTHi contributes to chronic or complex AOM, especially when mixed with Streptococcus pneumoniae.

Area of Science:

  • Pediatrics
  • Infectious Diseases
  • Microbiology

Background:

  • Acute otitis media (AOM) characterization is crucial for vaccine development against nontypable Haemophilus influenzae (NTHi).
  • A large database of culture-positive AOM cases was analyzed to understand NTHi AOM epidemiology.

Purpose of the Study:

  • To characterize acute otitis media (AOM) caused by nontypable Haemophilus influenzae (NTHi).
  • To identify risk factors associated with NTHi AOM compared to other common pathogens.

Main Methods:

  • Analysis of culture-positive AOM episodes in children under 5 years old from 1999-2006.
  • Inclusion of isolates from NTHi, Streptococcus pneumoniae, Moraxella catarrhalis, and Streptococcus pyogenes.
  • Multivariable regression analysis to identify independent risk factors for NTHi AOM.

Main Results:

  • NTHi was the most frequently recovered pathogen in AOM episodes (4928/8145).
  • Independent risk factors for NTHi AOM included winter season, bilateral AOM, >3 previous AOM episodes, and recent antibiotic consumption.
  • Mixed NTHi and S. pneumoniae episodes were associated with older age and bilateral AOM.

Conclusions:

  • NTHi AOM exhibits distinct characteristics: winter seasonality, bilaterality, recurrence, and association with prior antibiotic treatment.
  • These findings support the link between NTHi and prolonged or recurrent AOM morbidity.
  • Pathogen interaction, particularly between NTHi and S. pneumoniae, may contribute to chronic or complex AOM in older children with bilateral infections.

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