Figure 1. Electrophoretic patterns of PCR ribotypes of three S. aureus strains obtained with the three different primer pairs: lanes 1 to 3 with primer pair A, described by Gürtler and Stanisich (5), lanes 4 to 6 with primers B, described by Kostman et al. (3), and lanes 7 to 9 with primers C, described by Jensen et al. (6). Lanes 10 to 12 show PCR ribotypes from three S. aureus isolates collected from the same patient on different days. Lane M: 100-bp ladder.