228株结核分枝杆菌MLVA分型研究  被引量:2

Analysis on the 228 Mycobacterium Tuberculosis with MLVA

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作  者:同重湘 赵秀琴[2] 马建军 刘志广[2] 曹文静 杨永红 吕冰[2] 姜元 万康林[2] 

机构地区:[1]甘肃省兰州市肺科医院检验科,甘肃兰州730046 [2]中国疾病预防控制中心传染病预防控制所/传染病预防控制国家重点实验室,北京102206

出  处:《中国医药导报》2010年第16期97-98,共2页China Medical Herald

基  金:国家自然科学基金资助项目(30771853);甘肃省兰州市重点科研项目(07-1-94)

摘  要:目的:通过多位点可变数目串联重复序列(MLVA)分型,了解甘肃省临床分离结核分枝杆菌菌株基因型情况。方法:选择标化的15个VNTR位点,对临床分离菌株DNA进行检测,DNA指纹图谱使用BioNumerics4.5软件进行统计分析,得出聚类分析结果。结果:228株结核分枝杆菌被分为4大基因群,7个主要基因型,分别包含13(5.7%)、3(1.3%)、7(3.1%)、1(0.4%)、171(75.0%)、31(13.6%)、2(0.9%)个菌株;在株水平基因分型上,93(40.8%)株为独立基因型;其余菌株基因型分别包含2~10株结核分枝杆菌,共构成132个基因簇。结论:甘肃省临床分离结核分枝杆菌菌株存在丰富的基因多态性,MLVA方法具有较高的基因分型能力,可以满足结核分枝杆菌株水平DNA分型的需要。甘肃省临床分离结核分枝杆菌菌株主要为北京家族基因型菌株。Objective:By Multiple locus variable numbers of tandem repeats(MLVA) genotyping,to analyze the genotypes of epidemic Mycobacterium tuberculosis strains in Gansu. Methods:15 standardized MLVA loci were used to type the clinical isolated M. tuberculosis strains of Gansu. Results were analyzed with BioNumerics 4.5. The dendrogram was summarized from the fingerprintings. Results:The result of MLVA showed that 228 strains of M. tuberculosis were classified 4 major genetic groups and 7 main genotypes. The largest genotype included 171(75.0%) strains,the others were 13(5.7%) ,3(1.3%) ,7(3.1%) ,1(0.4%) ,31(13.6%) and 2(0.9%) respectively. Farther particulars,93 strains(40.8%) were belong to unique genotype. The other strains contained 2-10 M. tuberculosis,all 132 geno-clusters. Conclusion:The bacterium strains of M. tuberculosi in Gansu has a rich nucleotide polymorphisms. MLVA is very useful to type the genotype of M. tuberculosi strains. Beijing family genotype strain is the dominant genotype in Gansu.

关 键 词:结核分枝杆菌 多位点可变数目串联重复序列 基因分型 北京家族基因型 

分 类 号:R378.911[医药卫生—病原生物学]

 

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