A Study of DPK-060 to Investigate Clinical Safety and Efficacy in Patients With Acute External Otitis

Inclusion Criteria: * A clinical diagnosis of acute external otitis of a severity degree not requiring specialist care * Age 12 years and older Exclusion Criteria: * Known or suspected perforation of the tympanic membrane * A clinical diagnosis of chronic suppurative otitis media, acute otitis media, acute otorrhea or malignant otitis externa * Local ear canal abnormalities * Congenital abnormalities of the external auditory canal or obstructive bony exostosis * Mastoiditis or suppurative non-infectious ear disorders (e.g. cholesteatoma) * Malignant tumour of the external auditory canal * History of otologic surgery (except for surgery confined to the temporomandibular joint) * Seborrheic dermatitis or other dermatological conditions of the external auditory canal that would complicate evaluation * Current or prior use (within 7 days) of ear washes using alcohol, vinegar or other astringents * Any clinically relevant past or present infectious/viral disease * Current infection requiring systemic antimicrobial therapy * Current or prior use of systemic (within 14 days) or topical (within 7 days) antibiotics * Current or prior use of systemic (within 30 days) or topical (within 7 days) steroids * History of immune dysfunction/deficiency and immunosuppressive therapy * Diabetes mellitus