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Indications And Usage Studies Have Shown That Skin Tests With Cat Extract Are Useful In The Diagnosis Of Cat Allergy. As A Rule, Persons With Cat Allergy Have Positive Skin Reactions When Tested With Cat Extract, And Non-Allergic Individuals Rarely React 7, 8, 9 . However, The Relationship Between A Positive Skin Test And The Appearance Of Clinical Symptoms After Exposure To A Cat Is Not Absolute, I.e., Some Skin-Test Positive Persons Do Not Experience Allergic Symptoms After Exposure 10 . Failure To Experience Symptoms May Be Dose Related, Since It Is Known That Cats Vary Significantly In The Amount Of Fel D 1 They Produce 11 . The Efficacy Of Cat Extract Immunotherapy In The Treatment Of Bronchial Asthma Has Been Shown In Two Studies 12, 13 . A Reduction In Bronchial Sensitivity Was Observed In Five Patients With Cat Allergy, Whereas No Reduction Was Observed In Placebo Treated, Cat-Allergic Patients.
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