论文部分内容阅读
Introduction.Yersinia pestis contains three Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR loci) called YPa (YP1),YPb (YP2) and YPc (YP3).CRISPR loci analysis can provide important information for epidemiology, genotyping and evolutionary research on Y.pestis.Our objective was to study the CRISPR loci in Y.pestis strains from Brazilian natural plague foci and to compare with strains from natural plague foci in other places of the world.