Can a cat allergy develop later?

Yes, a cat allergy can develop later, even if a person previously had no allergic symptoms on contact with cats. This is because the immune system can adapt over time and become more sensitive to certain allergens. As a result, someone who was around cats for years without any problems may suddenly experience allergic reactions.

How can a cat allergy develop later?

A cat allergy occurs when the immune system overreacts to certain proteins that cats secrete through their saliva, dander and urine. This can develop later in life due to various factors, such as:

1. Changing immune response

The immune system adapts throughout life. Exposure to allergens may not cause a reaction initially, but over time, the immune system may begin to consider a cat allergen as harmful. As a result, an allergy can develop suddenly, even after years without symptoms.

2. Long-term exposure

People who live with cats for long periods of time may develop allergies over time. This happens because the immune system is increasingly exposed to allergens, which can lead to increased sensitivity and eventually allergic reactions.

3. Change in environmental factors

Factors such as air quality, stress, infections and changes in the living environment can affect the immune system. People who move to a new environment with higher levels of allergens may suddenly experience symptoms as a result.

4. Hormonal and biological changes

Hormonal fluctuations, such as during puberty, pregnancy or menopause, can affect the functioning of the immune system. This can cause someone who previously did not suffer from allergies to develop them later in life.

5. Cross-reactions with other allergies

People who are already allergic to pollen or house dust mites, for example, have an increased risk of developing a cat allergy. This is because some allergens share structures, allowing the immune system to cross-react and cause allergic symptoms on contact with cats.

What are the symptoms of cat allergy later in life?

The symptoms of a cat allergy that develops later are similar to those of a congenital cat allergy. Common symptoms are:

• Sneezing and a blocked or runny nose
• Itchy, watery or red eyes
• Wheezing, coughing or shortness of breath
• Skin rash or itchy spots
• Aggravation of asthmatic symptoms

The severity of symptoms can range from mild to severe and may depend on the degree of exposure to cat allergens.

What can you do if you later develop a cat allergy?

If you suspect you have developed a cat allergy, there are several steps you can take:

• Do an allergy test: A cat allergy test can determine whether you have IgE antibodies to cat allergens. This can be done at home with a self-test or through an allergist.
• Avoid prolonged contact with cats: Limit exposure to cats and their habitats to reduce allergic symptoms.
• Ensure a clean living environment: Regular cleaning, vacuuming and the use of air filters can help reduce allergens.
• Use medication if needed: Antihistamines and nasal sprays can help relieve symptoms. Consult a doctor for advice on medication.
• Consider immunotherapy: For severe cat allergies, immunotherapy (allergy vaccination) can be an effective treatment to reduce sensitivity to cat allergens.

Conclusion

Cat allergy can develop later, even in people who have been in contact with cats for years without symptoms. It can be caused by changes in the immune system, prolonged exposure to allergens, environmental factors and hormonal changes. If you suspect you have developed a cat allergy, it is wise to have an allergy test and take measures to reduce allergic reactions. For severe symptoms, a doctor may recommend additional treatments.