PCDH8 and bacterial urinary tract infection: Furthermore, the two virulence factors papC and iutA were both significantly more common among UTI strains as compared with fecal strains within the same phylogenetic group (papC: p < 0.0001, iutA: p = 0.007 in group B2 strains; papC: p = 0.0009, iutA: p < 0.0001 in group D strains).