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Pulsed-field gel electrophoresis of pseudo-outbreak strains. (A) BssHI digest. (B) NotI digest. *, patient pseudo-outbreak isolates; B, the one blood culture outbreak isolate; H1, anaerobic holding jar isolate; mw, molecular weight marker; C1, C2, environmental isolates from the University of Iowa reference laboratory unrelated to outbreak isolates. Arrows highlight a single band difference between blood and patient/holding jar isolates. SfiI restriction digest is not shown.
