关键词: 莱姆病, 伯氏疏螺旋体, 全沟硬蜱, 慢性游走性红斑

Abstract: The investigation of Lyme disease was earried out in 11 forestry plants and 6 counties of the Liupan Mountain in Ningxia province from 1994～1997.757 residents were tested for anti-bodies against borrelia (strain B31） by IFA.24(3.17%）,Residents had significant IgG titers (≥1: 128),and there were patients with a typical clinical symptoms of Lyme disease.141 ticks belonged to 5 species of 4 genera were collected in the above places,in which 1 genera and 4 specieswere firstly reported in Ningxia.50.0% (5/10) Ixodes persulcatus contained spirochetes using direct immunofluorescence examination, 3 isolates of Borrelia burgdorferi were recovered from 80Ixodes persulcatus.With the application of ELISA techniques for the detection of antibodies against Lyme disease, for the cattles collected from Liupan mountains and sheep.goats collectedfrom Xi-Hat-Gu and Yanchi prefecture, the positive rate was 23.88% (16/67）, 15.82% (25/158）and 20.31% (13/64) respectively.These results showed that there is a nature focus of Lyme disease in Ningxia.