Table 2.
Hemolytic and fimbrial adhesin-producingE. coli strains isolated from young animals with diarrhea and positive for Stx
| Toxins | No. (%) of E. coli strains | Serogroups (no. isolates) | ||
|---|---|---|---|---|
|
| ||||
| Period | ||||
|
| ||||
| 1980–1989 | 1990–1999 | 2000–2016 | ||
| LT-I and Stx-1 | 3 (1.7) | 12 (6.8) | 5 (2.8) | O1(1), O17(1), O23(3), O78(1), O139(11), O146(1), O153(2) |
| LT-II and Stx-1 | 5 (2.8) | 16 (9.1) | 21 (12) | O23(4), O26(3), O55(2), O103(4), O117(5), O123(1), O124(6), O144(3), O146(7), ONT(1), Rugous(6) |
| LT-I and Stx-2 | 0 | 1 (0.55) | 2 (1.1) | Rugous(3) |
| LT-II and Stx-2 | 0 | 0 | 6 (3) | O1(1), O10(1), O103(2), ONT(1), Rugous(1) |
| Sta and Stx-1 | 4 (2.2) | 2 (1.1) | 3 (1.7) | O103(2), O117(2), O123(1), O124(1), O144(1), Rugous(2) |
| Sta and Stx-2 | 2 (1.1) | 1 (0.5) | 5 (2.8) | O144(3), Rugous(5) |
| Eae and Stx-1 | 4 (2.2) | 3 (1.7) | 6 (3.4) | O23(2), O26(3), O55(2), O103(2), O117(1), O123(3) |
| Eae and Stx-2 | 0 | 2 (1.1) | 5 (2.8) | O146(1), ONT(1), Rugous(5) |
| Fimbriae | ||||
| F5 positive | 14 (8) | 54 (30.8) | 42 (24) | O23(6), O26(6), O55(4), O103(4), O117(15), O123(11), O124(6), O144(3), O146(7), ONT(1), Rugous(16), N* (41) |
| F41 positive | 2 (1.1) | 23 (13.1) | 25 (14.2) | O103(2), O117(5), O123(3), O124(1), O144(5), Rugous(12), N* (22) |
*
N—not typed.