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Chronic secretory otitis media: negative bacteriology

M Saffer1, J F Lubianca Neto, O B Piltcher

  • 1Foundation Federal School of Medical Sciences of Porto Alegre.

Acta Oto-Laryngologica
|November 1, 1996
PubMed
Summary

This study found no significant bacterial presence in middle ear fluid of children with chronic secretory otitis media (CSOM), contrasting with previous research. Findings suggest contamination may explain prior positive bacterial cultures in CSOM cases.

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Area of Science:

  • Otolaryngology
  • Microbiology
  • Pediatrics

Background:

  • Chronic secretory otitis media (CSOM) is a common pediatric condition.
  • The role of bacterial infection in CSOM pathogenesis remains debated.
  • Previous international studies report significant bacterial isolation rates in CSOM middle ear fluid.

Purpose of the Study:

  • To investigate the bacterial presence in middle ear effusions of children diagnosed with CSOM.
  • To compare bacterial findings in a local pediatric population with existing international literature.

Main Methods:

  • Bacteriological analysis of middle ear samples from 94 children with clinical and tympanometric CSOM diagnoses.
  • Gram staining and culture on MacConkey and blood agar media.
  • Antibiograms performed if bacteria were identified (Mueller Hinton medium).

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  • Exclusion of anaerobic cultures.

    • Main Results:

    • Bacterial growth was observed in only one sample (Staphylococcus epidermidis), considered contamination.
    • No other samples yielded bacterial growth.
    • A significant discrepancy exists between these findings and prior studies reporting up to 40% bacterial prevalence.

    Conclusions:

    • The study did not detect significant bacterial involvement in the genesis or maintenance of CSOM in this cohort.
    • Potential reasons for the divergence from previous literature are discussed.
    • Further research may be needed to clarify the role of bacteria in CSOM.