PFGE patterns of isolates from three children, P6 (lanes 1 to 4), K34 (lanes 5 to 8), and P5 (lanes 9 to 12), with OM. Isolates P6ME2.9 (lane 4), K34N2.6 (lane 5), and P5N2.8 (lane 12) each differ from the other isolates collected from P6, K34, and P5, respectively. Lanes M contain the size marker.