Distribution of the O-groups of the E. coli commensal and BSI collections isolates.

The number of isolates and the percentage are presented in the table. We compared the O-group diversity of E. coli isolates from BSI (all portals of entry, urinary portal of entry and digestive portal of entry) with the collection of commensal isolates, for all O-groups present in at least 5 strains in at least one of the two collections. We show the odds ratio (with 95% CI) for the risk of infection associated with colonization by each O-group (logistic model of infection status as a function of the O-group). O-groups with odds ratio significantly different from 1 are highlighted in bold. (XLSX)