acute infection of pinna An otitis externa which involves bacterial infections often related to underlying comorbidities as well as trauma. Common sources of trauma include ear piercing, boxing, blunt trauma, burns, bite wounds and iatrogenic insults. The common bacterial pathogens are staphylococcal and streptococcal species. DOID:10520 ICD9CM:380.11 SNOMEDCT_US_2025_09_01:56663002 UMLS_CUI:C0155392 disease_ontology otitis externa