Mixed infection by wild-type strains OG1RF and V583 in the kidneys and urinary bladders of mice (n = 21; competition assay). Data are expressed as the log(CFU)/gm for OG1RF or V583; the log(CFU)/gm for both kidneys were combined and averaged from two independent experiments. Black solid diamonds and triangles represent strains OG1RF and V583, respectively, for kidney homogenates, and empty diamonds and triangles represent OG1RF and V583, respectively, for urinary bladder homogenates. Horizontal bars represent geometric means. Log(CFU) were compared for statistical significance by the paired -test. The minimum detection limit in these experiments was 10and 10CFU/gm of kidney and urinary bladder homogenates, respectively. Mono-infection using strains OG1RF or V583 in the kidneys of mice (10CFU per mice, n = 9). Data are expressed as log(CFU)/gm for OG1RF recovered from kidney homogenates 48 h after infection; the log(CFU)/gm for a kidney pair were combined and averaged. Black and white triangles represent OG1RF and V583, respectively. Horizontal bars represent geometric means. The CFU of V583 recovered from kidneys was significantly reduced compared to the CFU of OG1RF, as determined by the unpaired -test.Copyright information:Taken from "Large scale variation in illustrated by the genome analysis of strain OG1RF"http://genomebiology.com/2008/9/7/R110Genome Biology 2008;9(7):R110-R110.Published online 8 Jul 2008PMCID:PMC2530867.