FIG. 1.

Unweighted pair group method with averages dendrogram of PFGE results based on the Dice distance matrix and schematic representation of the PFGE types (SmaI restriction enzyme) of PVL-positive and PVL-negative S. aureus isolates. NCTC 8325 is the reference strain for size markers (SM), expressed in kilobases. Square boxes indicate patients with identical isolates in the nose and abscess or blood. Two different isolates (PVL positive and PVL negative) were detected in the nose of patient 3.