Household dust

Household dust

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This image is part of the feature Understanding Asthma

Credit: POWER AND SYRED/SCIENCE PHOTO LIBRARY

Caption: Household dust. Coloured Scanning Electron Micro- graph (SEM) of a sample of household dust. Dust contains an assortment of substances which can cause asthma or other allergic reactions. The allergens seen here include: long hairs such as cat fur, twisted synthetic and woollen fibres, serrated insect scales, a pollen grain, plant and insect remains. Asthma or hay fever are often a hypersensitive and irritant response to substances that, in most people, are harmless. Airborne allergens may come into contact with the respiratory airways, skin or surface of the eye. Magnification: x115 at 6x7cm size. x380 at 8x12"

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Keywords: allergen, allergens, allergy, asthma, cause, causing, coloured, dirt, dirty, domestic items, dust, hay fever, hayfever, house dust, housedust, household, household dust, household goods, images, magnified image, microscopic photos, scanning electron micrograph, sem, sneeze, subjects

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