Table 2.
Serotypes, virulence factors and sequence types (STs) of swine STEC isolates
| ST | No. of isolates | Serotype a | 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 |
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.
bNinety-two STEC isolates were subtyped by primer-specific PCR except one isolate of O159:H16.