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XbaI PFGE patterns of clonal group A (CgA) and ciprofloxacin-TMP–SMZ-resistant CgG isolates from the phase II study. Lanes 1 and 10, lambda ladder; lane 2, prototype CgA isolate; lanes 3–6, putative CgA isolates; lanes 7–9, ciprofloxacin-TMP–SMZ-resistant CgG isolates.
