The Cow dander extract has shown to possess more allergenic activity than scrapings or whole skin extracts. Allergy Cow Dander test, AKA Allergy Cow Dander Fluorescence Assay is a test that is performed to calculate and estimate the level of IgE (Immunoglobulin E) Antibodies in the blood. This test uses the blood sample to determine if you are allergic to Cow Dander. A doctor consultation which will result in the prescription of this test is recommended. The lab report produced after the test will give you a detailed analysis and insight regarding the infection, if present.