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Moth Allergy

by
author image Jeremy Nicholson
Jeremy Nicholson has been writing since 2009, specializing in human anatomy and physiology, pathophysiology, biology and tarantula care. Nicholson holds a Bachelor of Science in zoology, a Bachelor of Arts in English and a Master of Science in biology, all from Texas Tech University.
Moth Allergy
Close-up of a moth resting on woodchips. Photo Credit ConstantinCornel/iStock/Getty Images

Other than occasionally flitting about the house or eating holes in your favorite sweater, moths are seemingly harmless. However, moths are actually a significant cause of allergies, both indoors and outdoors. Exposure to the wing scales and other body parts of these flying insects can cause skin irritation and respiratory distress.

Wing Scales

Moths and butterflies belong to the order Lepidoptera, which is Latin for "scale-wing." Their wings are covered in a layer of powdery scales. If you've ever handled a moth, you may have noticed a powder-like residue left behind on your hands. This is because the scales are shed when the insect's wings come into contact with another object. In addition, the scales fall off as the moth flies through the air, creating an airborne allergen.

Other Sources of Allergens

Moths may produce allergens other than their wing scales. If inhaled, the frass, or excrement, of a moth can elicit an allergic reaction. In addition, direct contact with many species of moths can cause skin irritation, due to the presence of urticating scales on the underside of the abdomen. These barbed scales can imbed into the skin, causing severe inflammation and itching. If inhaled, urticating scales can cause asthma and respiratory irritation.

People Affected

The people most at risk of developing an allergy to moths are entomologists and workers in facilities that raise moths as beneficial insects. These people work in facilities where the air may be filled with moth scales. Bakers frequently develop moth allergies, as the scales of the flour moth are a contaminant often found in flour and cereals. A study published in the January 1994 issue of "Annals of Allergy" suggests that people with asthma and other allergies are especially sensitive to moths.

Dealing with Moth Allergies

For those affected by moth allergies, the best course of action is to limit exposure to the insects. Many insect-rearing facilities have safety measures in place to limit workers' exposure to airborne allergens. Household moths can be controlled by storing clothes properly, or through the application of a pesticide. Serious moth infestations should be treated by a professional exterminator. Sensitive individuals should consult a physician to determine measures necessary to treat an allergic reaction to moths.

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