FIG. 2.

PFGE banding patterns of SmaI-digested chromosomal DNAs of Thai MRSA strains with and without reduced susceptibilities to glycopeptides. Lanes: 1, lambda concatemer standard marker (molecular sizes in kilobases are indicated on the left); 2 to 4, strains MR135, MR187, and MR209, respectively; 5 to 9, vancomycin-susceptible MRSA strains isolated from four patients hospitalized in the same surgical ward during the same period (from 1998 to 1999) as the patient from whom strain MR135 was isolated; 10 to 13, vancomycin-susceptible MRSA strains isolated from five patients admitted to the same medical intensive care unit during the same period (from 1996 to 1997) as the patient from whom strain MR187 was isolated; 14, Mu3; 15, SmaI-digested total DNA from NCTC 8325, used as a standard.