Representative PFGE patterns among VRE isolated from sludge derived from the industrial production of vancomycin (lanes 1 to 5), from the sewage treatment plant receiving such sludge (lanes 6 to 13), and from blue mussels collected in the proximity of the sewage effluent (lane 14). Lanes M, molecular weight marker; lane 1, E. faecium strain 3 (PFGE type A1); lane 2, E. mundtii strain 68 (PFGE type D); lane 3, E. faecium strain W2 (PFGE type B2); lane 4, E. faecium strain W5 (PFGE type B1); lane 5, E. faecium strain WE3 (PFGE type A4); lane 6, E. faecalis strain LSIE1 (PFGE type J); lane 7, E. faecium strain LSI5 (PFGE type A4); lane 8, E. faecalis strain LSIE6 (PFGE type L1); lane 9, E. faecium strain LB1 (PFGE type B1); lane 12, E. faecium strain LB7 (PFGE type B3); lane 14, E. faecium strain ΦME1 (PFGE type C); lanes 10, 11, and 13, VanA-negative strains of Pediococcus acidilattici.