Cat allergens are all around our environments. It is important to take note of when you experience symptoms to know where it may be coming from.
If you’ve ever been told you’re allergic to cats or dogs but don’t even have one, you’re not alone. Turns out, exposure to pet allergens isn’t as straightforward as it seems.
A recent study across allergy clinics in Italy uncovered something surprising: many people who test positive for pet allergies don’t actually live with pets, but they’re still being exposed in ways that matter. This information can be useful to understand how you might be getting exposed to cat allergens in your daily life.
Why this matters for cat allergy
Allergies aren’t just triggered by having a pet at home.
Doctors and researchers often ask, “Do you have animals at home?” to understand exposure to allergens. But this simple question may overlook other ways people come into contact with pet allergens, especially for those without pets. There are many ways and places that you can come into contact with cat allergens. This can include places such as public transport, your workplace, school, or a park.
What the study looked at
Researchers tracked pet sensitization, which is basically who showed allergic responses to cats or dogs, and how those patients had been exposed to animals. They looked at various possible exposures. What they found is that you don’t have to live with pets to be exposed. Only 29% of allergic patients actually owned a cat or dog.
That means more than two-thirds of those allergic to pets didn’t currently have one. But many still had contact in other ways. 20% were exposed through someone else’s pet. Whereas 14% had indirect contact (think schools, public spaces, friends’ homes). And surprisingly, 15% reported no known contact, yet still tested positive
This shows how easily pet allergens, especially cat dander, can travel and linger, even where you least expect it.
Why it matters for allergy tests and care
A “no” on the pet ownership question doesn’t mean no risk. A more thoughtful look at how, when, and where someone interacts with animals can lead to better allergy care. If you do not own a cat and have allergies, it may be a good idea to discuss with your doctor about these possibilities and steps you can take. Although it may not be possible to get rid of all the allergens in your daily life, you can still be mindful of possible interactions.
What you can do next
If you're managing a cat allergy, whether or not you have a pet, start by paying attention to your environment. Notice symptoms after visits to schools, offices, friends’ homes, or even transportation. A HEPA filter or changing clothes after pet exposure may help, even for non-pet owners.
And as always, keep the bond between you and your animal companions rooted in patience, observation, and a little science-backed love.
You’ve got this and you’re not alone in figuring it out.
Written by: Tharuniga
Designed by: Lexin Yuan
Reference:
Liccardi, G., Calzetta, L., Baldi, G., Berra, A., Billeri, L., Caminati, M., Capano, P., Carpentieri, E., Ciccarelli, A., Crivellaro, M. A., Cutajar, M., D’Amato, M., Folletti, I., Gani, F., Gargano, D., Giannattasio, D., Giovannini, M., Lombardi, C., Schiavo, M. L., … Passalacqua, G. (2018). Allergic sensitization to common pets (cats/dogs) according to different possible modalities of exposure: an Italian Multicenter Study. Clinical and Molecular Allergy CMA, 16(1), Article 3. https://doi.org/10.1186/s12948-018-0081-z
Mayo Clinic. (2021, August 4). Pet allergy: Causes, Symptoms & Causes. Mayo Clinic. https://www.mayoclinic.org/diseases-conditions/pet-allergy/symptoms-causes/syc-20352192
Mayo Clinic. (2021, August 4). Pet allergy: Diagnosis & treatment. Mayo Clinic. https://www.mayoclinic.org/diseases-conditions/pet-allergy/diagnosis-treatment/drc-20352198