acute otitis externa acute infection of pinna https://www.malacards.org/card/acute_infection_of_pinna MONDO:0001053 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. SCTID:56663002 DOID:10520 MEDGEN:509948 UMLS:C0155392 ICD9:380.11