致病性钩端螺旋体限制性内切酶酶切分析分型研究

为了建立一种简便、稳定的钩体分型方法，我们采用限制性内切酶ＥｃｏＲＩ对致病性钩端螺旋体八个血清群５４个血清型６４株国内外钩体参考株及２７株野生株进行限制性内切酶酶切分析（ＲＥＡ）。结果表明：９１株菌中共有５９种不同的限制性内切酶图谱（ＲＥＰｓ），根据前５条高分子酶切片段可以区分不同的ＲＥＰｓ；除部分血清群中个别不同的血清型有相同的ＲＥＰ型外，大部份血清型都有其独特的ＲＥＰ型，同一血清群往往拥有共同的酶切片段；所研究的同一血清型的国内和国际参考株的ＲＥＰｓ不同；大多数野生株的ＲＥＡ型和参考株相同，差异仅表现为个别高分子带的缺少和增加，ＲＥＡ分型和血清分型吻合较好，通过ＲＥＡ分型基本可区分不同的血清型。

IDENTIFICATION OF LEPTOSPIRA INTERROGANS BY RESTRICTION ENDONUCLEASE ANALYSIS

Leptospira intemational and domestic reference strains.which belong to 54 serovars.and 27 field strains were examined by using EcoR I restriction endonuclease patterns(REPs) can only be identified by the first five high moleularsegments.reference strains from China and other countries have differert REPs.Most field strains have the same or similar REPs with corresponding reference strains.only a few difference in nonmatching REPs.A notable result was that the field strains of serovar pomona have the same REP with the intemational reference strain but differnce from the domestic reference strain.