Otitis externa refers to any inflammatory disease of the outer ear (pinna) or outer ear canal.
In dogs, common causes include:
- - Staphylococcus pseudintermedius
- - Pseudomonas aeruginosa
- - Streptococcus canis
- - Corynebacterium auriscanis
- - Proteus mirabilis
Clinically affected dogs present with head shaking, holding the affected ear down, pain of palpation of the ear and a characteristic malodor when the ear flap is raised.
Treatment usually requires irrigation of the ear with a suitable antimicrobial wash and use of broad-spectrum antimicrobial drugs applied either topically and/or parenterally.