Aylesworth R, Vance J C
J Am Acad Dermatol. 1982 Nov;7(5):583-9. doi: 10.1016/s0190-9622(82)70137-9.
The hair follicle mites Demodex folliculorum and Demodex brevis are ubiquitous obligatory ectoparasites of man. We studied these mites in a consecutive series of skin biopsies submitted to a dermatopathology laboratory; 10% of all biopsies and 12% of all follicles contained demodectic mites. The prevalence of both species increased with age, but D. brevis had a lower prevalence. The face was most heavily infested by both species, but D. brevis had a wider distribution on the body. Males were more heavily infested than females with both species, the difference being strongest for D. brevis. Other ecologic characteristics noted include the type of follicles infested, follicular dilation, perifollicular inflammation, and the presence of a dense homogeneous eosinophilic material surrounding the mites. These data confirm ecologic and epidemiologic differences between the two species and emphasize that they should be distinguished in future studies of the roles these mites may play in a variety of disease states.
毛囊螨形螨和皮脂蠕形螨是人类普遍存在的专性体外寄生虫。我们在提交给皮肤病理学实验室的一系列连续皮肤活检样本中研究了这些螨虫；所有活检样本的10%和所有毛囊的12%含有蠕形螨。两种螨虫的患病率均随年龄增长而增加，但皮脂蠕形螨的患病率较低。面部受两种螨虫的感染最为严重，但皮脂蠕形螨在身体上的分布更广泛。两种螨虫在男性中的感染程度均高于女性，皮脂蠕形螨的这种差异最为明显。其他观察到的生态特征包括受感染的毛囊类型、毛囊扩张、毛囊周围炎症以及螨虫周围存在致密均匀的嗜酸性物质。这些数据证实了两种螨虫在生态和流行病学上的差异，并强调在未来研究这些螨虫在各种疾病状态中可能发挥的作用时，应将它们区分开来。
