DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Pus due to a middle ear infection in a 3-year-old boy. This condition is called otitis media. In chronic cases, there is an accumulation of fluid in the middle ear, which can cause hearing loss (glue ear). Otitis media usually responds well to treatment with antibiotic drugs, though it may sometimes require surgical drainage.
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