关键词: 毛囊蠕形螨, 皮脂蠕形螨, 桉叶油, 杀螨率

Abstract: Objective To observe the effect of oleum eucalypti in killing Demodex in vitro. Methods The mites were collected with adhesive cellophane tape technique and randomly divided into five groups. The killing effect on Demodex was investigated with different concentrations of oleum eucalypti against Demodex in vitro. The morphologic changes were pictured using Motic Images software. Results Oleum eucalypti was highly powerful to kill D.folliculorum and D.brevis in vitro. The mortality increased with concentration and time. The least effective concentration of killing Demodex was 6.25 ,while the most suitable and effective concentration of killing both D.folliculorum and D.brevis in vitro was 12.5. As soon as the compound was applied,the mites contracted intensely with more activity,after that they loosed and the activity weakened. Conclusion Oleum eucalypti is an effective compound in killing Demodex in vitro with less resistance.