XbaI PFGE profiles of representative isolates from farm C (VTEC O2:H29 isolates) and from farm B (VTEC O136:H12 isolates). Lanes 1, 6, and 11, Salmonella enterica serovar Braenderup marker (M). Lane 2, VTEC O2:H29 isolate from cattle on farm C. Lanes 3 to 5, VTEC O2:H29 isolates from a wild bird sampled on farm C. Lane 7, VTEC O136:H12 isolate from a rat sampled on farm B. Lanes 8 to 10, VTEC O136:H12 isolates from cattle on farm B.