PFGE patterns of representative SXT^R (R) and SXT^S (S) <i>S. flexneri</i> 2a strains and their plasmid cured (C) derivatives.

<p>The dendrogram was constructed with Bionumerics v.4.5 software using the unweighted pair group method with arithmetic means (UPGMA). Dendrogram analysis showed that the plasmid cured strains and the parent strains are very close (95%) in their homology.