应用斑点热立克次体１９０ＫＤ蛋白基因的ＰＣＲ／ＳＳＣＰ分析了我国斑点热群黑龙江立克次体分离株５４、３６的基因型，并与国际标准株和国内其它株作了比较。结果显示黑龙江立克次体呈现出独特的ＳＳＣＰ图谱，与国际标准株显著不同，也和国内其它分离株差异明显。而ＨＬ５４和ＨＬ３６株完全相同。基因单链分析说明，我国斑点热群立克次体分离株存在２个种，即西伯利亚立克次体种和黑龙江立克次体种。同时证明应用ＰＣＲ／ＳＳＣＰ分析斑点热群立克次体型别，方法筒便、省时、结果准确 The genotypes of Rickettsia cholerae isolates 54 and 36 in China were analyzed by PCR / SSCP using the 190KD gene of the spotted hot rickettsia, and compared with the international standard strains and other domestic strains. The results showed that the Rickettsia showed a unique SSCP pattern, which was significantly different from the international standard strains and also significantly different from other domestic isolates. While HL  54 and HL  36 strains exactly the same. Single-stranded gene analysis shows that there are 2 species of Rickettsia isolates in China, namely Rickettsia sibirica and Rickettsia species in Heilongjiang. At the same time, it was proved that the PCR / SSCP method was used to analyze the speckle group Rickettsia. The method was simple, time-saving and accurate