Food mites in dogs: allergies caused by mites in
Food mites in dogs: allergies caused by mites in the
What are food mites in dogs?
Food mites (storage mites) are microscopic mites that live and reproduce in stored foods — including dry dog food. Main species: Acarus siro (flour mite), Tyrophagus putrescentiae (mold mite), Lepidoglyphus destructor, and Glycyphagus domesticus.
Food mites are not parasites that directly infest the dog — they colonize the food environment. Their health relevance lies elsewhere: mite bodies and excretions are potent allergens that can trigger allergic reactions (type I hypersensitivity) in sensitized dogs.
Background + scientific context
Brazís et al. (2008, Veterinary Record, https://pubmed.ncbi.nlm.nih.gov/18757619/) studied sensitization patterns to storage mites and house dust mites in dogs with pollen-associated allergy: dogs with a known pollen allergy frequently showed parallel sensitization to Lepidoglyphus destructor and Tyrophagus putrescentiae. Cross-reactions with house dust mites (Dermatophagoides farinae, D. pteronyssinus) make differential diagnosis considerably more difficult — shared allergens (such as tropomyosin and HSP70) lead to overlapping IgE reactions.
Saridomichelakis et al. (2008, Veterinary Dermatology, https://pubmed.ncbi.nlm.nih.gov/18616710/) analyzed the causes of allergy in dogs with atopic dermatitis: storage mites were identified as a relevant source of sensitization in a substantial proportion of atopic dogs. Opened bags of dry food stored at room temperature showed clear mite contamination — especially in humid environments and with longer storage. The food itself is both a habitat and a food source for the mites.
Nuttall et al. (2009, Veterinary Record, https://pubmed.ncbi.nlm.nih.gov/19439627/) studied hypersensitivity to house dust mites and storage mites in dogs: the clinical signs of storage mite allergy are practically indistinguishable from those of house dust mite allergy — itching, ear infections, paw pad and interdigital problems, and diffuse skin redness. Allergy diagnostics (intradermal testing, specific IgE serology) can identify food mites as a trigger, but cross-reactivity with house dust mites makes this more difficult.
Vitomalia position
Storage mites in dry food are an underestimated allergy trigger. An atopic dog that regularly receives dry food from poorly stored bags may be sensitized to storage mites — without this ever having been tested. Mite prevention through proper food storage is simple and free.
When do storage mites become relevant?
- Dog with atopic dermatitis and an unclear allergen source
- Itching symptoms independent of season (no clear pollen pattern)
- Ear infections and problems between the toes as ongoing issues
- Dry food is stored in open bags at room temperature
- Dog continues to itch despite a hypoallergenic diet
Practical use
Storage mites in dry food — risk factors:
| Factor | Risk | Measure |
|---|---|---|
| Open bag at room temperature | High | Airtight container |
| Damp storage environment | Very high | Store dry and cool |
| Storage >4–6 weeks after opening | Increased | Buy smaller packages |
| Bag directly on the floor | Increased | Hang up or store elevated |
| Summer months | Seasonally increased | Refrigerated storage possible |
Preventing storage mites in dog food: - Store dry food in airtight containers made of stainless steel or hard plastic - Use opened bags within 4–6 weeks - Store food in a cool, dry place (cellar, not near the kitchen) - Choose smaller pack sizes for single dogs - Clean the food bowl regularly (mite residues at the bottom of the bowl)
Diagnostics when suspected: - Intradermal testing by a veterinary dermatologist with a mite extract panel (storage mites and house dust mites) - Specific IgE serology: but consider cross-reactions - Elimination test: switch to fresh food or wet food for 6–8 weeks → improvement in symptoms?
Common mistakes & myths
- “Packaged dry food is mite-free.” No — mites can migrate into opened bags. The original packaging only protects the food until it is opened. After that, the mite load depends on storage conditions.
- “Storage mite allergy and house dust mite allergy are the same.” They overlap significantly (cross-reactions), but some dogs react specifically to storage mites without being sensitized to house dust mites — and vice versa.
- “Good storage solves the problem.” Prevention helps avoid new sensitization and reduces allergen exposure. In dogs that are already sensitized, reducing storage mites in food can help — but an established allergy also requires allergological diagnostics and, if appropriate, immunotherapy.
Scientific status 2026
Storage mites as allergens in atopic dogs are scientifically established. Current research focuses on differentiating house dust mite sensitization from storage mite sensitization and on the value of allergen-specific immunotherapy (ASIT), including for storage mites. Reducing mites through optimized food storage is considered a simple, evidence-based preventive measure.
Frequently asked questions
What are storage mites in dogs and where do they come from?
Storage mites are microscopic mites that live in stored dry food. They settle in after food bags have been opened — especially at room temperature and in humid conditions. Their feces and body components are potent allergens for sensitized dogs.
How can I recognize a storage mite allergy in my dog?
Typical signs include non-seasonal itching, ear infections, licking of the paws and between the toes, and skin redness — identical to other environmental allergies. Diagnosis is made through intradermal testing or IgE serology with storage mite extract by a veterinary dermatologist.
How should I store dry food to avoid storage mites?
After opening, store dry food in airtight containers (stainless steel, hard plastic) in a cool, dry place. Use opened bags within 4–6 weeks. Choose smaller packs to avoid long storage after opening.
Related terms
Sources & further reading
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Brazís, P., Serra, M., Selles, A., Dethioux, F., Briere, G., Blondeau, J., … Puigdemont, A. (2008). Sensitisation to storage and house dust mites in pollen-hypersensitive dogs. Veterinary Record, 163(9), 270–274. https://pubmed.ncbi.nlm.nih.gov/18757619/
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Saridomichelakis, M. N., Marsella, R., & Koutinas, A. F. (2008). Investigation into the role of aetiology in the clinical presentation of canine atopic dermatitis. Veterinary Dermatology, 19(4), 191–199. https://pubmed.ncbi.nlm.nih.gov/18616710/
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Nuttall, T. J., Hill, P. B., Bensignor, E., & Livoti, F. (2009). House dust and storage mite hypersensitivity in dogs: a multicentre study. Veterinary Record, 164(20), 621–625. https://pubmed.ncbi.nlm.nih.gov/19439627/