House Dust Mite Allergy caused by Mite Excrements:
House dust mite allergy is rarely caused by the house dust mites themselves, but rather by their excrements (feces). What makes matters worse, the excrement and the allergens contained therein are present all year long- as opposed to pollen allergens which induce allergic reactions only during periods of pollen. Constant exposure to house dust mite allergens can lead to chronic (long-term) illness.
Due to the dry air during the heating periods, the finely grained excrement breaks down to an extremely fine powder. This powder sticks to the surrounding materials, such as the fiber structure in carpets and upholstery and may become airborne. This happens when the carpet or rug is walked upon, when sitting down or rising from upholstery, and when shaking out blankets and airing out rooms.
The house dust mite problem can be solved only by first destroying the house dust mites. The excrement can gradually be removed from the textiles by repeated cleaning procedures.