fifty-five patients ( mean age 36.6 +/- 22.1 years ) with sixty infected ears with otorrhoea complicating otitis externa , recurrent otitis media with tympanic membrane perforation , or infected mastoid cavities and post-operative tympanoplasties , were treated for 14 days with either an aqueous solution of gentamicin 0.3 % or an aqueous suspension of colistin 0.3 % , neomycin 0.33 % and hydrocortisone 1.0 % .
C0013443
ears
C0021355
otitis externa