Atopic dermatitis — allergy triggered by environmental substances — is the second most common cause of chronic itching and skin disease in dogs, after flea allergy dermatitis. At Shivraj Pet Clinic & Lab, we diagnose and manage atopy regularly. Understanding what triggers it helps you manage your pet's environment and reduce flare-ups.
What is Atopy?
Atopy (atopic dermatitis) is an inherited predisposition to develop allergic reactions to environmental substances that are inhaled or absorbed through the skin. Unlike food allergies (which cause gastrointestinal signs more often), atopy primarily causes skin disease — itching, redness, recurring ear infections, and skin fold infections.
Common Environmental Triggers
Dust mites (Dermatophagoides farinae and D. pteronyssinus) — the most common atopic allergen worldwide. Dust mites live in bedding, carpets, and upholstered furniture. They peak indoors year-round but worsen in humid monsoon conditions.
Moulds and fungi — Alternaria, Aspergillus, Penicillium, and Cladosporium spores are present outdoors and indoors, particularly in damp homes and during monsoon season.
Pollen — tree pollens (March–May), grass pollens (June–August), and weed pollens (September–November) cause seasonal atopy. Unlike humans who sneeze, dogs with pollen allergy typically itch.
Insect proteins — storage mites in food bags, cockroach allergens, and insect fragments.
Human dander — yes, some pets are allergic to humans.
Breeds Predisposed to Atopy
- German Shepherds
- Labradors and Golden Retrievers
- Bulldogs and French Bulldogs
- Boxers
- West Highland White Terriers
- Shih Tzus and Lhasa Apsos
- Cocker Spaniels
Signs of Atopy in Dogs
- Constant licking of paws — the feet become reddish-brown from saliva staining
- Rubbing the face on furniture or carpet
- Scratching at armpits, groin, and belly
- Recurring ear infections — often the first sign
- Red, inflamed skin between the toes
- Secondary skin infections (bacterial and yeast) from chronic scratching
- Worsening symptoms during specific seasons (if pollen-triggered) or year-round (if dust mite-triggered)
Signs of Atopy in Cats
Cats with atopy typically develop miliary dermatitis (tiny crusty bumps), eosinophilic plaques, and symmetrical hair loss from excessive grooming. Head and neck itching is common.
Diagnosis
Atopy is a clinical diagnosis supported by ruling out other causes of itching — particularly flea allergy and food allergy. We may recommend:
- A strict flea prevention trial (fleas cause identical signs and must be eliminated first)
- A dietary elimination trial to rule out food allergy
- Intradermal allergy testing or serum allergy testing to identify specific triggers
Treatment Options
Environmental control — reduce dust mite load by washing bedding in hot water weekly, using allergen-proof mattress covers, and running a HEPA air purifier. Avoid synthetic carpets and soft furnishings where mites accumulate.
Medicated shampoos — antifungal and antiseborrhoeic shampoos reduce secondary infections and remove allergens from the skin surface.
Antihistamines — helpful in mild cases but only effective in about 30% of atopic dogs.
Fatty acid supplementation — omega-3 and omega-6 fatty acids improve the skin barrier and reduce inflammation.
Immunotherapy (allergy shots or sublingual drops) — the only treatment that addresses the underlying immune dysregulation rather than suppressing symptoms. Effective in 60–80% of atopic patients when tailored to specific allergens.
Targeted medications (Apoquel, Cytopoint) — highly effective at controlling itch with good safety profiles. Available at our clinic.
Call 077569 65169 to schedule an allergy assessment at Shivraj Pet Clinic, Wakad & Pimple Saudagar, Pune.
