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尘螨,就是人们所熟知的螨虫,它是一种类似蜘蛛的节肢小动物,但比蜘蛛要小得多,身长只有1/3毫米左右,有8只脚,身上还有刚毛。由于尘螨身体小又没有明显的颜色,人的肉眼很难看得清。尘螨喜欢栖息于室内灰尘中,是以人体脱落的皮屑、霉菌孢子、棉花短纤维为食。尘螨在温暖、潮湿的环境中繁殖很快,室内的床铺等家具及枕头、地毯、沙发、棉絮,以及蓄有羽毛和羽绒的衣物内等,都是尘螨生长繁殖的最好地方。有报道说,一个用了15年的枕头中,其重量的1/3是尘螨的排泄物,1克枕头内容物含有1000多个尘螨。还有调查表明,200毫克羊毛毯灰尘中能检出100多个尘螨,同样重量的床垫灰尘中检出的尘螨有90多个,就连我们经常清扫的居室地板尘中,也能检出17个尘螨。
Dust mites, known as mites, are spider-like arthropods, but much smaller than spiders, about 1/3 millimeter long, with eight feet and body bristles. Because the dust mites body is small and no obvious color, the human eye is hard to see clearly. Dust mites like to inhabit the dust in the room, so they shed dander, mold spores and staple fiber for food. Dust mites reproduce quickly in a warm, humid environment. Furniture and pillows, carpets, sofas, cotton battens, and clothing in feathers and downholstery, such as interior beds, are the best places to grow and reproduce dust mites. It has been reported that in a 15-year-old pillow, one third of its weight is dust excrement, and 1-gram pillow contents contain more than 1,000 dust mites. There are surveys show that 200 mg of wool blanket dust can detect more than 100 dust mites, the same weight of dust in the mattress detected more than 90 dust, and even we often clean the floor dust in the room, 17 dust mites were detected.