Simultaneous differentiation and typing of Entamoeba histolytica and Entamoeba dispar

被引:47
作者
Zaki, M [1 ]
Meelu, P [1 ]
Sun, W [1 ]
Clark, CG [1 ]
机构
[1] Univ London London Sch Hyg & Trop Med, Dept Infect & Trop Dis, London WC1E 7HT, England
关键词
D O I
10.1128/JCM.40.4.1271-1276.2002
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Sequences corresponding to some of the polymorphic loci previously reported from Entamoeba histolytica have been detected in Entamoeba dispar. Comparison of nucleotide sequences of two loci between E. dispar strain SAW760 and E. histolytica strain HM-1:IMSS revealed significant differences in both repeat and flanking regions. The tandem repeat units varied not only in sequence but also in number and arrangement between the two species at both the loci. Using the sequences obtained, primer pairs aimed at amplifying species-specific products were designed and tested on a variety of E. histolytica and E. dispar samples. Amplification results were in complete agreement with the original species classification in all cases, and the PCR products displayed discernible size and pattern variations among the isolates.
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收藏
页码:1271 / 1276
页数:6
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