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目的：为了探讨蠕形螨的有关生态问题。方法：对正常体温和高于正常体温的不同人群作了人体蠕形螨检出率的比较。结果：毛囊蠕形螨多数寄生在毛囊内，颚体朝向毛囊底，少数朝向毛囊侧壁及毛囊口；皮脂蠕形螨皮表分布与毛囊蠕形螨大致相同，只是寄生毛囊内的皮脂蠕形螨的颚体仅见出或入皮脂腺方向。蠕形螨检出率夜间（７４％）比白天（５２％）高，体温增高（体温≥３８℃）者（９１．１％）比正常体温（６６．７％）高，浴后（６０．９％）比浴前（２９．９％）高，环境温度０±１℃、１０±１℃、２０±１℃、３０±１℃的检出率依次为２８％、５２％、６２％和７６％。各组间差别均具有显著意义（Ｐ＜０．０１）。结论：宿主体温及环境温度的变化对蠕形螨检出率有直接影响。夜间检出率增高似与温度或／和蠕形螨夜间爬到毛囊口或皮脂腺口交配有关。
Objective: To discuss the ecological problems of Demodex. Methods: The detection rate of human Demodex was compared among different groups with normal body temperature and higher than normal body temperature. Results: The majority of Demodex follicles parasitized in the hair follicles, the jaws toward the bottom of the hair follicles, a few towards the follicular side wall and hair follicles mouth; Demodex skin mite skin distribution and hair follicle mites almost the same, but the parasitic hair follicles sebum Mite jaws only see or into the sebaceous gland orientation. The detection rate of Demodex was higher at night (74%) than that at daytime (52%). The body temperature increased (91.1%) was higher than normal body temperature (66.7% 9%) was higher than that of the former bath (29.9%). The detection rates of ambient temperature 0 ± 1 ℃, 10 ± 1 ℃, 20 ± 1 ℃ and 30 ± 1 ℃ were 28%, 52%, 62% and 76%. The differences among groups were significant (P <0.01). Conclusion: The changes of host body temperature and ambient temperature have a direct effect on the detection rate of Demodex. Increased detection rate at night seems to be related to temperature and / or creeping mites climbing to the hair follicle or sebaceous glands at night.