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Table 2 The sample sources and distribution of virulence factors among different O-serotype of E. coli ST131 isolates

From: Prevalence and characteristics of ST131 clone among unselected clinical Escherichia coli in a Chinese university hospital

Characteristics Clonal groups, number of isolates (%) P a
All isolates (n = 83) O25b (n = 55) O16 (n = 28) O25b vs O16
Source
 Urine 55 (66.3%) 36 (65.5%) 19 (67.9%)  
 Blood 12 (14.5%) 10 (18.2%) 2 (7.1%)  
 Other 16 (19.3%) 9 (16.4%) 7 (25.0%)  
Antimicrobial resistance
 ATM 30 (36.1%) 24 (43.6%) 6 (21.4%)  
 CAZ 22 (26.5%) 16 (29.1%) 6 (21.4%)  
 CTX 59 (71.1%) 41 (74.5%) 18 (64.3%)  
 FEP 26 (31.3%) 22 (40.0%) 4 (14.3%) 0.024
 TZP 1 (1.2%) 0 1 (3.6%)  
 CIP 58 (69.9%) 49 (89.1%) 9 (32.1%) < 0.001
 LEV 58 (69.9%) 49 (89.1%) 9 (32.1%) < 0.001
 AMK 7 (8.4%) 4 (7.3%) 3 (10.7%)  
 SXT 56 (67.5%) 36 (65.5%) 20 (71.4%)  
Adhesins
papAH 22 (26.5%) 19 (34.5%) 3 (10.7%) 0.034
papC 23 (27.7%) 21 (38.2%) 2 (7.1%) 0.004
papEF 22 (26.5%) 19 (34.5%) 3 (10.7%) 0.034
papG allele I 0 0 0  
papG allele II 21 (25.3%) 18 (32.7%) 3 (10.7%) 0.034
sfa/focDE 1 (1.2%) 1 (1.8%) 0  
focG 0 0 0  
afa/draBC 7 (8.4%) 2 (3.6%) 5 (17.9%) 0.040
fimH 82 (98.8%) 54 (98.2%) 28 (100%)  
gafD 0 0 0  
sfaS 7 (8.4%) 6 (10.9%) 1 (3.6%)  
Toxins
hlyA 14 (16.9%) 11 (20.0%) 3 (10.7%)  
cnf1 10 (12.0%) 8 (14.5%) 2 (7.1%)  
cdtB 0 0 0  
cvaC 3 (3.6%) 1 (1.8%) 2 (7.1%)  
Siderophores
fyuA 81 (97.6%) 53 (96.4%) 28 (100%)  
iutA 77 (92.8%) 52 (94.5%) 25 (89.3%)  
Capsules
kpsMTII 62 (74.7%) 43 (78.2%) 19 (67.9%)  
kpsMTIII 0 0 0  
kpsMT K1 10 (12.0%) 8 (14.5%) 2 (7.1%)  
kpsMT K5 47 (56.6%) 40 (72.7%) 7 (25.0%) < 0.001
Miscellaneous
nfaE 0 0 0  
rfc 0 0 0  
malX 76 (91.6%) 51 (92.7%) 25 (89.3%)  
traT 73 (88.0%) 46 (83.6%) 27 (96.4%)  
Virulence scoresb 7 (3 to 11) 7 (3 to 11) 6 (4 to 10)  
  1. a P values, by either χ2 or Fisher’s exact test, are shown where P < 0.05
  2. bmedian number of virulence factors (range)