The Dermatophagodies farinae is a blood test to determine if you’re allergic to Dermatophagodies farina (American Dust Mite). The allergy is diagnosed by detecting the IgE antibodies in your blood. The House Dust Mite Allergy (HDMA) is an allergic reaction of the immune system to DerP1 and DerF1 enzymes which are used by the house dust mite to digest food. They feed on human micro skin cells. A person sheds about 1 to 1.5 grams of the cells every day. The symptoms include itchy, watering eyes, itchy nose or throat, persistent sneezing, wheezing or sniffing, runny or clogged nose, cough and other asthmatic complaints.