Bed is the main source of dust mites and their faeces.(1) By wrapping mattress, duvet and pillows with special covers (called encasings) which does not allow mite bodies and droppings to penetrate, can be an effective strategy to avoid contact with the allergens. This can lead to a significant decrease in the symptoms of dust mite allergy.(1,2)
For some people with mite allergy the use of encasings alone may be sufficient to alleviate the symptoms.(1,2) In any case, they are a useful component in the treatment of allergy to house dust mites.(1,2,3)
World Allergy Organization (WAO):(4)
"The finely woven covers which have pore size of approximately 6 μm are effective both at preventing colonization and allergen escape"
European Academy of Allergy and Clinical Immunology (EAACI):(5)
"Mattress encasing which allows the exchange of humidity but not the transfer of allergens have been demonstrated to be useful barriers between the human body and dust mites in the mattress"
American Academy of Allergy, Asthma and Immunology (AAAAI), The American College of Allergy, Asthma and Immunology (ACAAI), and the Joint Council of Allergy, Asthma and Immunology:(6)
"Recommend that patients should use mite allergen-proof mattress, box spring, and pillow encasings to decrease exposure to mite allergens"
American Academy of Pediatrics (AAP):(7)
"Because dust mites feed on shed human skin, which is abundant in the bed, first line approaches to reduce dust mite allergen exposure include washing of bed linens and the use of allergen impermeable mattress and pillow encasements"