Allergy dermatophagoides farinae Test

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.

It is recommended that you wear a sleeveless or short-sleeved shirt or a full-sleeved shirt with sleeves rolled up to enable easy withdrawal of blood from your arm. No test preparation is required. There are no dietary restrictions that you have to follow before the test. Certain medications that you are currently taking may affect the test results. So, make sure to inform your doctor regarding all the medications, vitamins, herbs and supplements you are taking. In case the blood withdrawn is to be used for further tests, your doctor will inform you the necessary preparations in prior.

The test is useful to diagnose the allergy and establish the allergens responsible for eliciting signs and symptoms. The test may also be useful to identify allergens responsible for an anaphylactic episode. Detection of IgE antibodies in the sample indicates a likelihood of allergic disease. The values of IgE antibodies detected and the related interpretation is as follows, If the level is between 0.70-3.49 kU/L, it may be class 2 allergy and positive. If the level varies from 3.50 to 17.4 kU/L, it may be class 3 allergy and positive. Levels of 50.0 to 99.9 kU/L and above indicate strongly positive reaction to allergy.

A few millilitres of blood sample is required for this test. This will be obtained directly from your arm. The insertion site is prepared for the withdrawal of blood. An elastic band is wrapped around your arm to make the veins swell with blood. The site to be injected is cleansed with antiseptic. The needle is inserted into the vein and a tube attached to the needle is then filled up with blood. A gauze pad or cotton ball is placed over the punctured area as the needle is removed. The sample is transferred to the laboratory for further examination.