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Table 2 Serotypes, virulence factors and sequence types (STs) of swine STEC isolates

From: Characterization of Shiga toxin-producing Escherichia coli isolated from healthy pigs in China

ST

No. of isolates

Serotypea

stx 2e b

hlyA

ehxA

astA

irp2

fyuA

paa

F18

ST10

2

O2:H32/[H32](1CC, 1SC)

+

-

-

-

-

-

-

-

ST88

4

ONT:H19/[H19](1SC, 3CC)

+

-

-

+

+

+

-

-

ST206

3

O143:H38/[H38](3CC)

+

-

-

-

-

-

-

-

ST361

1

O20:H30 (1CC)

+

-

-

+

-

-

-

-

1

ONT:H30 (1CC)

+

-

-

+

-

-

-

-

ST501

2

O86:H11 (2CC)

+

+

-

+

-

-

-

+

ST540

1

ONT:H30 (1SC)

+

-

-

-

-

-

-

-

3

ONT:[H30] ( 1SC, 2CC)

+

-

-

-

-

-

-

-

1

O114:[H30] (1CC)

+

-

-

-

-

-

-

-

ST641

1

O87:H10 (1SC)

+

+

-

-

-

-

-

+

ST694

1

ONT:[H33] (1CC)

+

-

-

+

-

-

-

-

ST710

2

O20:H26 (2 F)

+

-

-

+

-

-

-

-

17

O20:H30/[H30](4 F, 13CC)

+

-

-

+

-

-

-

-

1

O20:[H30] (1 F)

+

-

+

+

-

-

+

-

3

O20:[H30](1 F, 2CC)

+

-

-

+

-

-

-

-

3

O172:H30/[H30](3CC)

+

-

-

+

-

-

-

-

ST953

2

ONT:H17 (2CC)

+

-

-

-

-

-

+

-

ST993

10

ONT:H30 (10CC)

+

-

-

-

-

-

-

-

2

ONT:H30 (2CC)

+

-

-

+

-

-

-

-

3

ONT:H30/[H30](2 F, 1CC)

+

-

-

-

-

-

-

-

ST1294

1

ONT:H30 (1CC)

+

-

-

-

-

-

-

-

ST1494

2

ONT:H21/[H21](2CC)

+

-

-

+

-

-

-

-

ST2514

1

O100:H20 (1 F)

+

-

-

+

-

-

-

-

1

O100:H20 (1SC)

+

-

-

+

-

-

+

-

5

O100:H20/[H20](1 F,4CC)

+

-

-

-

-

-

-

-

1

O100:[H20] (1CC)

+

-

+

-

-

-

+

-

ST3628

9

O2:H32/[H32](9 F)

+

+

-

-

-

-

-

-

ST3629

4

O9:H30/[H30](4CC)

+

-

-

+

-

-

-

-

1

ONT:H30 (1CC)

+

-

-

+

-

-

-

-

ST3630

1

O159:H16 (1CC)

-

-

-

+

-

-

+

-

ST3633

1

O76:H25 (1 F)

+

+

-

-

-

-

-

-

ST3631

1

ONT:H7 (1SC)

+

-

-

+

-

-

+

-

ST3634

1

ONT:H7 (1SC)

+

-

-

+

-

-

-

-

ST3870

1

O116:H11(1 F)

+

+

-

+

-

-

-

+

Total

93

93

93

14

2

50

4

4

7

4

  1. aThe numbers and sources are showed in the parentheses. F, fecal samples; CC, colon contents samples; SC, small intestine contents samples. ONT, Not typeable with available O antisera. The H types of non-motility isolates are determined by fliC sequencing and indicated in the square brackets.
  2. bNinety-two STEC isolates were subtyped by primer-specific PCR except one isolate of O159:H16.