Malassezia dermatitis/otitis
Also known as: Yeast dermatitis · Malassezia-Dermatitis · Hefepilz-Dermatitis · Malassezia otitis · Yeast otitis externa
Overview
What it is
This is an inflammatory skin and ear condition caused by an overgrowth of Malassezia, a type of yeast that naturally lives on a dog's skin. When the skin barrier is disrupted by allergies or a weakened immune system, these yeast organisms multiply uncontrollably and cause irritation. This is considered an opportunistic infection, meaning it takes advantage of an underlying health issue, and it often involves complex genetic predispositions.
How it presents
Owners usually notice intense itching, redness, greasy skin patches with a musty odor, and frequent head shaking or brownish ear discharge. These symptoms typically first appear in young to middle-aged dogs.
Treatment
The yeast overgrowth is treatable with topical antifungals, medicated shampoos, and ear drops, but underlying triggers usually require lifelong management. The lifetime cost for managing this chronic condition typically ranges from 500 to 4000 EUR.
How it's tested
Affected breeds
Treatment cost
Estimated range of typical treatment cost. Actual cost depends on severity, clinic and region.
Frequently asked
What is Malassezia dermatitis/otitis?
This is an inflammatory skin and ear condition caused by an overgrowth of Malassezia, a type of yeast that naturally lives on a dog's skin. When the skin barrier is disrupted by allergies or a weakened immune system, these yeast organisms multiply uncontrollably and cause irritation. This is considered an opportunistic infection, meaning it takes advantage of an underlying health issue, and it often involves complex genetic predispositions.
How is Malassezia dermatitis/otitis tested?
Various clinical and genetic tests are used depending on the breed and presentation.
Which breeds are most affected?
Most commonly affected: Miniature Poodle, West Highland White Terrier.