关键词: 人体蠕形螨, 检出率, 生态

Abstract: AIM:To exploreseveralecologicalaspectsof human Demodex . METHOD:A comparison of human Demodex detection rates between populations with normalbodytemperatureandabove was conducted. RESULT: Demodex folliculorum mostly parasitized in hair follicles with their gnathosomas facing the bottom part of the follicles,with a few facing the side wall and the orifice of the follicles.The skin distribution of Demodex brevis was found practically similar to that of Demodex folliculorum except for the fact thatthe gnathosomas orientation of the former was only seen moving in and out toward the sebaceous glands. The detection rates were higher at night (74%)than in daytime(52%);higher in individuals with body temperatures38℃ (91.1%) thanin those with normal temperatures(66.7%); higher in individuals after bathing (60.9%) than in those before bathing (29.9%).The detection rates under the ambient temperatures 0±1℃,10±1℃,20±1℃,30±1℃ were 28%,52%,62%,76%,respectively,the differences beingdistinctly significant ( P 0.01). CONCLUSION:Thechanges in the body temperature of the hosts and in the ambient temperature have immediate effects on the detection rate of Demodex .