Fig. 1.

The 45 pulsed-field gel electrophoresis (PFGE) banding patterns of the 183 Shigella isolates, which were grouped into 11 PFGE groups. (a) Lane M, molecular weight marker (lambda phage DNA ladder), lanes 1–23; PFGE banding patterns 1–24 respectively. (b) Lane M, molecular weight marker, lanes 25–45, PFGE banding patterns 25–45 respectively. The PFGE banding patterns 1–4, 5–14, 15–18, 19–20, 21–24, 25–27, 28–30, 31, 32–35, 36–41, and 42–45 were grouped into 11 groups, i.e. PFGE groups I–XI respectively [(a) and (b)].