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Otitis media (silent): a potential cause of childhood meningitis
D R Djerić1, P A Schachern, M M Paparella
1Otopathology Laboratory, Otitis Media Research Center, University of Minnesota.
Abstract:
Sixteen temporal bones from 8 infants with otitis media, who died of meningitis, and 6 controls from infants with only otitis media, were studied histologically. All bones contained middle ear effusion and residual mesenchyme, but, unlike the controls, the meningitic cases showed considerable histopathological tissue changes of chronic and acute otitis media and chronic inflammatory cells in the round window membrane and within the perilymph, the modiolus, and the cochlear aqueduct, suggesting the latter as likely portals from the inner ear to the meninges. Since all tympanic membranes were intact and 3 were histologically normal, this silent route of infection warrants medical vigilance.
Insights
Infants with meningitis and otitis media showed inner ear inflammation, suggesting the cochlear aqueduct as a pathway to the meninges. Intact tympanic membranes highlight this silent infection route, requiring medical attention.
Area of Science:
- Otolaryngology
- Pediatric Pathology
- Infectious Diseases
Background:
- Otitis media is common in infants.
- Meningitis can be a severe complication in infants.
- The relationship between otitis media and meningitis requires further investigation.
Purpose of the Study:
- To investigate the histopathological changes in temporal bones of infants with meningitis and otitis media.
- To identify potential pathways for meningitis spread from the middle ear.
Main Methods:
- Histological examination of 16 temporal bones from infants with meningitis and otitis media.
- Comparison with 6 control temporal bones from infants with only otitis media.
- Analysis of middle ear effusion, mesenchyme, and inner ear structures.
Main Results:
- Meningitic cases exhibited chronic and acute otitis media changes.
- Chronic inflammatory cells were found in the round window membrane, perilymph, modiolus, and cochlear aqueduct.
- The cochlear aqueduct was identified as a likely pathway from the inner ear to the meninges.
Conclusions:
- The cochlear aqueduct serves as a potential route for meningitis infection from the middle ear.
- Intact tympanic membranes do not preclude inner ear and meningeal infection.
- Medical vigilance is crucial for identifying this silent route of infection in infants.