Population structure of the 91 <i>S. aureus</i> isolates from BU patients.

<p>The population structure was obtained by BURP analysis. In the present <i>S. aureus</i> collection, comprising 13 different <i>spa</i>-types no <i>spa</i>-CCs could be generated. The BURP analysis grouped isolates together into three groups with no founder, comprising 27 (30% of all isolate), 29 (32% of all isolate) and 11 (12% of all isolate) <i>S. aureus</i> isolates, respectively. Twenty isolates (22% of all isolates) comprising six <i>spa</i>-types (46% of all <i>spa</i>-types) were identified as singletons, and four isolates (4% of all isolates) comprising one <i>spa</i>-type (t11375, 8% of all <i>spa</i>-types) were excluded. The circle size is proportional to the number of isolates in each cluster.