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Dust mite allergy is an allergy to a microscopic
organism that lives in the dust found in all dwellings
and workplaces. House dust, as well as some house
furnishings, contains microscopic mites. Dust mites
are perhaps the most common cause of perennial
allergic rhinitis. House dust mite allergy usually
produces symptoms similar to pollen allergy
and also can produce symptoms of asthma.
House dust mites, which live in
bedding, upholstered furniture,
and carpets, thrive in summer and
die in winter. In a warm, humid
house, however, they continue to
thrive even in the coldest months.
The particles seen floating in a shaft of sunlight
include dead dust mites and their waste products.
These waste products, which are proteins,
actually provoke the allergic reaction.
What is house dust?
Rather than a single substance, so-called house dust is
a varied mixture of potentially allergenic materials. It
may contain fibers from different types of fabrics and
materials such as
Cotton lint, feathers, and other stuffing materials
Dander from cats, dogs, and other animals
Bacteria
Mold and fungus spores (especially in damp areas)
Food particles
Bits of plants and insects
Other allergens peculiar to an individual
house or building
Cockroaches are commonly found in crowded cities
and in the southern United States. Certain proteins in
cockroach feces and saliva also can be found in house
dust. These proteins can cause allergic reactions or
trigger asthma symptoms in some people, especially
children. Cockroach allergens likely play a significant
role in causing asthma in many inner-city populations.
Courtesy: National Institute of Allergy and Infectious Diseases
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San Antonio, Texas
Introduction to Allergies
What is an allergy?
What is allergic rhinitis? (Hay Fever)
Why are some people allergic?
What is an allergic reaction?
Allergy Symptoms
Pollen Allergy
Mold Allergy
Animal Allergy
Dust Allergies
What Is Food Allergy?
Introduction to Asthma
Contact Dermatitis
What are Hives?
Latex Allergies
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