关键词: 蜱类, 鼠类, 北京林区

Abstract: ObjectiveThe investigation was conducted from April to October in 2000 in several forest areas of Beijing,the object of which is to know of the density,constitution,seasonal fluctuation and predominant species of ticks and mice for further appreciating the risk to the people health.MethodsFree ticks were collected by dragging a blanket over the vegetation on the ground and field mice were captured with mousetrap everyday.Results1 608 free ticks were collected,including H.longicorni,H.concinna and D.silvarum,14 parasite ticks were also collected from mice bodies,including 8 I.persulcatus and 6 R.sanguineus. H.longicornis was found as the predominant species,accounting for more than 77.3% of the total number of collected ticks.In addition to Qinglongxia Valley of Huairou County,H.longicorni was found the predominant species,accounting for over 70%.Ticks were active from April to September in Tanghekou of Huairou County.The peak appears in the last ten-day period of May and the secondary peak appears in the last ten-day period of July.Whereas in Shidu of Fangshan district,the discrepancies of tick and mouse species,density and proportion may be related to the ecological environment of the different sites.Ticks were active from the last ten day period of April to October the peak and the secondary peak appear in the last ten day period of May and July respectively.87 mice belonging to 8 species were captured of which,the ratio of Rattus confucianus is the highest,accounting for 46%.Conclusion5 species of ticks and 8 species of mice were collected from forest areas of Beijing.They may play an important role in developing,maintaining and transmitting tick-borne diseases.