Skip to main content

Table 3 Distribution of virulence genes (%) in ESBL-producing E. coli isolates

From: Molecular epidemiology of extended-spectrum beta-lactamase-producing Escherichia coli in Tunisia and characterization of their virulence factors and plasmid addiction systems

Virulence factors

Total

CTX-M producers

Non CTX-M producers

CTX-M-15 producers

CTX-M-15 B2 producers

B2 non-ST131

B2 ST131

CTX-M-15 B2 ST131producers

 

N = 163 (%)

N = 118

N = 45

N = 101

N = 52

N = 37

N = 24

N = 23

Total

910

730

180

671

463

332

193

186

Mean

5.58

6.18

4.0

6.64

8.90

8.97

8.04

8.08

Adhesin

3 (1.8)

2 (1.6)

1 (2.2)

2 (1.9)

-

1 (2.7)

-

-

papG I

papG II

21 (12.8)

19 (16.1) *

2 (4.4)

19 (18.8)‡

15 (28.8) †

10 (27.2)

5 (20.8)

5 (21.7)

papG III

36 (22.0)

30 (25.4)

6 (13.3)

30 (29.7) ‡

25 (48.0) †

24 (64.8) γ

4 (16.6)

4 (17.3)

papC

35 (21.4)

29 (24.5)

6 (13.3)

29 (28.7) ‡

25 (48.0) †

25 (67.5) γ

3 (12.5)

3 (13)

fimH

138 (84.7)

100 (84.7)

38 (84.4)

85 (84.2)

51 (98.1) †

36 (97.3)

24 (100)

23 (100)

afa/draBC

8 (4.9)

4 (3.3)

4 (8.8)

4 (3.9)

2 (3.8)

3 (8.1)

1 (4.1)

1 (4.3)

sfa/foc

26 (15.9)

20 (16.9)

6 (13.3)

20 (19.8) ‡

18 (34.6) †

22 (59.4) γ

-

-

iha

49 (30.0)

45 (38.1) *

4 (8.8)

43 (42.5) ‡

36 (69.2) †

14 (37.8) γ

24 (100)

23 (100)

hra

38 (23.3)

29 (24.5)

9 (20.0)

28 (27.7)

19 (36.5) †

24 (64.8) γ

-

-

Iron uptake

104 (63.8)

78 (66.1)

26 (57.7)

68 (67.3)

49 (94.2) †

33 (89.1)

24 (100)

23 (100)

fyuA

iutA

82 (50.3)

65 (55.0) *

17 (37.7)

60 (59.4) ‡

37 (71.2) †

16 (43.2) γ

24 (100)

23 (100)

Toxin

27 (16.5)

24 (20.3) *

3 (6.6)

23 (22.8) ‡

22 (42.3) †

24 (64.9) γ

2 (8.3)

2 (8.6)

hylA

cnfI

19 (11.6)

17 (14.4)

2 (4.4)

17 (16.8) ‡

14 (26.9) †

15 (40.5) γ

-

-

sat

38 (23.3)

37 (31.3) *

1 (2.2)

35 (34.6) ‡

30 (57.6) †

8 (21.6) γ

24 (100)

23 (100)

Cell protection

119 (73.0)

94 (79.6) *

25 (55.5)

84 (83.2) ‡

40 (76.9)

28 (75.5)

18 (75)

18 (78.2)

traT

kpsM II

69 (42.3)

64 (54.2) *

5 (11.1)

59 (58.4) ‡

45 (86.5) †

27 (72.9) γ

23 (95.8)

22 (95.6)

Other pheR

98 (60.1)

73 (61.8)

25 (55.5)

65 (64.3)

35 (67.3)

22 (59.4)

17 (70.8)

16 (69.5)

  1. *: p < 0.05 for CTX-M producers vs. non CTX-M producers.
  2. ‡: p < 0.05 for CTX-M-15 producers vs. non CTX-M producers.
  3. †: p < 0.05 for CTX-M-15 B2 producers vs. other phylogroup isolates with CTX-M-15.
  4. γ: p < 0.05 for B2 non-ST131 isolates vs. B2 ST131 isolates.
Back to article page

BMC Microbiology

ISSN: 1471-2180

Contact us