Abstract
A few PCR-based DNA typing methods using repetitive elements contained within both protein-coding genes and noncoding DNAs have been reported for Entamoeba histolytica over the years. The serine-rich E. histolytica protein and tRNA-linked short tandem repeats (STRs) are most commonly used to investigate the relationship between parasite genotype and E. histolytica infection outcome. Many E. histolytica infections in China have been reported; however, little genome information has been provided. In the current paper, five Chinese E. histolytica samples were reported: three amoebic liver abscess cases, one combined case and one asymptomatic case. Our study is the first to report on the DNA typing information of E. histolytica in China. We included two city, one imported, and two country cases. Sequence analysis of serine-rich protein genes confirmed the presence of seven sequence types in five isolates. The STRs amplified from the samples revealed five STR variations in the A-L, four in the N-K2, and R-R loci, three in D-A, S(TGA)-D and S-Q loci. Two country patients were found to have a different outcome of infection with the same genotypes of E. histolytica, whereas in a city case, one E. histolytica strain had led to different...Continue Reading
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