[Effects of five Chinese herbs on human demodicid mites ].

Objective: To research the effects of five Chinese herbs of , pine needles and on human demodicid mites .

Methods: The human demodicid mites were acquired with the cellophane tape method. The ethanol heat reflux extractions were carried out on the 5 kinds of Chinese herbs to be studied and as the positive control, so as to get the herbal extracts. Next, the drug administration was carried out to the demodicid mites, and the inhibitory or killing effects of the 6 kinds of Chinese herbs above mentioned on the vermiform mites were observed under a microscope. It was considered to be dead when the bodies of the demodicid mites stopped moving. Besides, the duration from drug administration to death of the vermiform mites was recorded.

Results: and could effectively inhibit and kill human demodicid mites. The effect of and was similar to the effect of , and the effect of was weaker than 's effect. Among them, took a relatively short time (4.60 min ± 1.66 min) min and took the longest time (114.65min ± 80.14min) to ; Whereas, took the shortest time (3.56min ± 1.92 min) min and took the longest time (194.24min ± 134.96 min) min to

Conclusions: The effects of and on human demodicid mites are similar to that of The effects of and pine needles are weaker than that of S has no acaricidal effect.