Microbiology of Middle Ear Infections prof . hanan habib & dr.ali somily pathology & laboratory medicine college of medicine, KSU. Objectives. Upon completion of the lecture , students should be able to: Define middle ear infection Know the classification of otitis media (OM).
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Upon completion of the lecture , students should be able to:
< 3months of age
> 3 months of age
most of the effusions are sterile
Mostly Bacterial ,often a complication of viral URTI. Pain often severe and continuous in bacteria causes.
First 1-2 days:
Fever (39 C), irritability, earache , muffled nose.
Bulging tympanic membrane ,poor mobility and obstruction by fluid or inflammatory cells on otoscopic examination.
Pus and ear exudativedischargereleased spontaneously thenpain and fever begin to decrease.
2-4 weeks :
Healing phase, discharge dies up and hearing becomes normal.