Related Experiment Videos
Microbiology of otitis media
Summary
Common bacteria like Streptococcus pneumoniae and Haemophilus influenzae cause otitis media (OM). While viruses and mycoplasmas are rarely found in middle ear fluid (MEF), bacteria persist in some cases of persistent middle ear effusion.
Area of Science:
- Otolaryngology
- Microbiology
- Pediatrics
Background:
- Otitis media (OM) is a common childhood infection.
- Microbial etiology of OM has been studied via middle ear fluid (MEF) cultures.
Purpose of the Study:
- To document the microbiology of otitis media.
- To identify common bacterial and viral pathogens in middle ear fluid.
Main Methods:
- Cultures of middle ear fluid (MEF) obtained by needle aspiration.
- Analysis of bacterial and viral isolates from MEF in multiple studies.
Main Results:
- Streptococcus pneumoniae and Haemophilus influenzae are primary OM pathogens.
- Gram-negative enteric bacilli found in ~20% of young infants; rare in older children.
- Viruses (e.g., RSV, influenza) and Mycoplasma pneumoniae infrequently isolated from MEF.
- Bacteria identified in 50% of children with persistent MEF.
Conclusions:
- S. pneumoniae and H. influenzae are key OM pathogens.
- Viruses and mycoplasmas are uncommon causes of OM.
- Persistent middle ear effusion may involve ongoing asymptomatic infection or immune response.