Table 2

Distribution of phylogenetic groups and sequence type 131 among 953 E. coli isolates from reproductive-age women with cystitis or pyelonephritis and healthy fecal controls

Phylogenetic/clonal groupaNo. (%) of isolates by sourceP value by isolate sourceb
Fecal (n = 330)Cystitis (n = 322)Pyelonephritis (n = 301)Fecal vs cystitisFecal vs pyelonephritisPyelonephritis vs cystitis
A132 (40)25 (8)9 (6)<0.001<0.001NS
B130 (9)13 (4)12 (5)0.0110.01NS
B2102 (31)213 (66)211 (70)<0.001<0.001NS
D66 (20)64 (20)57 (19)NSNSNS
ST13113 (4)42 (13)89 (30)<0.001<0.001<0.001
O25b ST13113 (4)37 (12)73 (24)<0.001<0.001<0.001
O16 ST1310 (0)6 (2)15 (5)0.014<0.0010.044
  • a ST131 is a subset of phylogenetic group B2. O25b and O16 are subsets of ST131.

  • b P values (by Fisher's exact test) are shown where P < 0.05. NS, nonsignificant.