蠕形螨又称毛囊虫,为一种永久性小型寄生螨,主要寄生部位为颜面部的皮质腺和毛囊,与痤疮、酒糟鼻等皮肤损害有一定关系[1]。虽然蠕形螨感染较普遍,多为带虫感染[2],且极少引起不适[3],故常被忽视。为了解在校大学生蠕形螨的感染情况,作者于2004年3~5月对首都医科大学268名大学 Demodex mites, also known as trichomoniasis, is a permanent small parasitic mites, the main parasitic sites for the facial cortical glands and hair follicles, and acne, rosacea and other skin damage have a certain relationship [1]. Although Demodex infection is more common, mostly infected with worms [2], and rarely cause discomfort [3], it is often overlooked. In order to understand the infection of demodex in college students, the author from March to May 2004, 268 University Capital Medical University