Cat Dander Antigen is typically used in skin prick tests or blood tests to determine if a person has developed an allergic reaction to cats. In a skin prick test, a small amount of the antigen is applied to the skin, usually on the forearm or back, and then the skin is pricked with a sterile lancet. If the person is allergic to cats, a localized allergic reaction, such as redness, swelling, or itchiness, will occur at the site of the test.

In blood tests, Cat Dander Antigen is mixed with a person’s blood sample in a laboratory setting. The sample is then analyzed to detect the presence of specific IgE antibodies, which are produced by the immune system in response to an allergic reaction. The level of IgE antibodies can indicate the severity of the allergy to cat dander.