Purpose

The aim of the study was to examine Demodex survival in makeup cosmetics, i.e., powder cream, mascara, and lipstick, and to determine whether cosmetics shared with others can be a source of D. folliculorum infection.

Methods

Live D. folliculorum adults were placed in cosmetic samples and their motility was observed under a microscope. The mites were fully or partially immersed in the powder cream and lipstick, and only partially immersed in the mascara. Partial immersion means that only the opisthosoma was covered by the cosmetic, whereas the gnathosoma and podosoma had no contact with the cosmetic. Cessation of motility was regarded as a sign of death.

Results

In the control (mites placed on a microscope slide with no cosmetics), the survival time was 41.2 h. D. folliculorum that were immersed fully or partially in the lipstick substrate were viable for 38.5 h and 148 h, respectively. The survival time of the mites at full and partial immersion in the powder cream was 0.78 h and 2.16 h, respectively. The average survival time in the mascara was 21 h.

Conclusions

Makeup cosmetics used by different individuals at short intervals (from several hours to several days) can be a source of transmission of Demodex sp. mites.

中文翻译：

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共用化妆品作为毛囊蠕形螨感染的途径

目的

该研究的目的是检查化妆品（即粉霜、睫毛膏和口红）中蠕形螨的存活率，并确定与他人共用的化妆品是否会成为毛囊蠕形螨感染的来源。

方法

活的D. folliculorum成虫被放置在化妆品样品中，并在显微镜下观察它们的运动性。螨虫全部或部分浸入粉霜和口红中，仅部分浸入睫毛膏中。部分浸没是指只有牙槽骨被化妆品覆盖，而颌骨和足骨与化妆品没有接触。停止运动被认为是死亡的标志。

结果

在对照组（放置在没有化妆品的显微镜载玻片上的螨虫）中，存活时间为 41.2 小时。D. folliculorum完全或部分浸入唇膏基质中的时间分别为 38.5 小时和 148 小时。螨虫在粉霜中完全浸入和部分浸入的存活时间分别为 0.78 小时和 2.16 小时。睫毛膏的平均存活时间为 21 小时。

结论

不同人在短时间内（从几小时到几天）使用的化妆品可能是蠕形螨的传播源。螨虫。