Babe K S, Arlian L G, Confer P D, Kim R
Department of Internal Medicine, Medical Center of Delaware, Newark, USA.
J Allergy Clin Immunol. 1995 Apr;95(4):801-5. doi: 10.1016/s0091-6749(95)70121-4.
House dust mites, Dermatophagoides farinae and Dermatophagoides pteronyssinus, are important components in the development of asthma.
We measured the prevalence of house dust mites in a tertiary care hospital located in a temperate geographic region where dust mites were prevalent in homes.
The density of Dermatophagoides spp. was measured in hospital hallways, carpeted patients' rooms, and noncarpeted patients' rooms by vacuuming the floor in the summer and winter seasons. Bedrooms in the homes of employees were sampled as a summer control group. A total of 141 dust samples was obtained.
No D. farinae or D. pteronyssinus was found in 60 hospital dust samples that were obtained during the winter season. Although mites were found in some locations in the hospital during the summer dust collection, mite density in these locations and the average mite density for all samples were insignificant. During the summer dust samples from the bedroom carpets of all employees' homes sampled were positive for mites, with many homes having moderate or high populations (range, 22 to 8340 mites per gram of dust).
The dust mite prevalence in a hospital could be kept very low even though mite levels in employees' homes were moderate to high. The factors responsible for the low mite density in the hospital were maintenance of low relative humidity, use of low-pile carpets, and good housekeeping and laundering practices.
屋尘螨，即粉尘螨和户尘螨，是哮喘发病的重要因素。
我们在一个温带地理区域的三级护理医院测量屋尘螨的患病率，该地区家庭中尘螨普遍存在。
在夏季和冬季通过对医院走廊、有地毯的病房和无地毯的病房地面吸尘来测量尘螨属的密度。将员工家中的卧室作为夏季对照组进行采样。共获得141份灰尘样本。
在冬季采集的60份医院灰尘样本中未发现粉尘螨或户尘螨。虽然在夏季灰尘采集期间在医院的一些地方发现了螨虫，但这些地方的螨虫密度以及所有样本的平均螨虫密度都不显著。在夏季，所有员工家中卧室地毯的灰尘样本螨虫检测均为阳性，许多家庭螨虫数量中等或较多（范围为每克灰尘22至8340只螨虫）。
即使员工家中螨虫数量中等至较多，医院中的尘螨患病率仍可保持在很低水平。医院螨虫密度低的原因是保持低相对湿度、使用低绒地毯以及良好的清洁和洗涤习惯。
