Table 1 Frequency and associations between virulence genes and E. coli pathogroups
Genetic element | Virulence gene | EHEC (n = 64) n, % (95%-CI)a | typical EPEC (n = 73) n, % (95%-CI)a | atypical EPEC (n = 235) n, % (95%-CI)a | STEC (n = 52) n, % (95%-CI)a | E. coli (n = 21) n, % (95%-CI)a |
|---|---|---|---|---|---|---|
pMAR2 [12] | bfpA | 0, 0 (0;5.6) | 68b , 93.2 c (84.7;97.7) | 0, 0 (0;1.6) | 0, 0 (0;6.8) | 0, 0 (0;16.1) |
pO157 [46] | ehxA | 61, 95.3c (86.9;99.0) | 0, 0 (0;4.9) | 65, 27.7 (22.0;33.9) | 26, 50.0 c (35.8;64.2) | 0, 0 (0;16.1 |
pO157 [46] | espP | 37, 57.8c (44.8;70.1) | 1, 1.4 (0.03;7.4) | 26, 11.1 (7.4;15.8) | 14, 26.9c (15.6;41.0) | 0, 0 (0;16.1) |
pO157 [46] | etpD | 19, 29.7c (18.9;42.4) | 3, 4.1 (0.86;11.5) | 79, 33.6c (27.6;40.0) | 0, 0 (0;6.8) | 0, 0 (0;16.1) |
pO157 [46] | katP | 36, 56.3c (43.3;68.6) | 1, 1.4 (0.03;7.4) | 40, 17 (12.4;22.4) | 1, 1.9 (0.05;10.3) | 0, 0 (0;16.1) |
OI-71 [31] | nleA | 47, 73.4c (60.9;83.7) | 17, 23.3 (14.2;34.6) | 119, 50.6c (44.1;57.2) | 0, 0 (0;6.8) | 0, 0 (0;16.1) |
OI-71 [31] | nleF | 45, 70.3c (57.6;81.1) | 19, 26 (16.5;37.6 | 87, 37 (30.8;43.5) | 0, 0 (0;6.8 | 0, 0 (0;16.1) |
OI-71 [31] | nleH1-2 | 63, 98.4c (91.6;100.0) | 60, 82.2 (71.5;90.2) | 205, 87.2c (82.3;91.2) | 0, 0 (0;6.8) | 0, 0 (0;16.1) |
OI-122 [31] | ent/espL2 | 64, 100.0c (94.4;100.0) | 46, 63c (50.9;74.0) | 129, 54.9 (48.3;61.4) | 0, 0 (0;6.8) | 0, 0 (0;16.1) |
OI-122 [31] | nleB | 64, 100.0c (94.4;100.0) | 46, 63c (50.9;74.0) | 129, 54.9 (48.3;61.4) | 0, 0 (0;6.8) | 0, 0 (0;16.1 |
OI-122 [31] | nleE | 59, 92.2c (82.7;97.4) | 46, 63c (50.9;74.0) | 128, 54.5 (47.9;61.0) | 0, 0 (0;6.8) | 0, 0 (0;16.1) |
OI-57 [31] | nleG5 | 33, 51.6c (38.7;64.2) | 9, 12.3 (5.8;22.1) | 38, 16.2 (11.7;21.5) | 0, 0 (0;6.8) | 0, 0 (0;16.1) |
OI-57 [31] | nleG6-2 | 57, 89.1c (78.7;95.5) | 9, 12.3 (5.8;22.1) | 107, 45.5c (39.0;52.1) | 0, 0 (0;6.8) | 0, 0 (0;16.1) |
CP-933N [31] | espK | 59, 92.2c (82.7;97.4) | 14, 19.2 (10.9;30.1) | 68, 28.9 (23.2;35.2) | 0, 0 (0;6.8) | 0, 0 (0;16.1) |
Stx-phage [47] | stx 1 | 39, 60.9c (47.9;72.9) | 0, 0 (0;4.9) | 0, 0 (0;1.6) | 18, 34.6c (22.0;49.1) | 0, 0 (0;16.1) |
Stx-phage [31] | stx 2 | 33, 51.6c (38.7;64.2) | 0, 0 (0;4.9) | 0, 0 (0;1.6) | 48, 92.3c (81.5;97.9) | 0, 0 (0;16.1) |
LEE [31] | eae | 64, 100.0c (94.4;100.0) | 73, 100c (95.1;100.0) | 235, 100c (98.4;100.0) | 0, 0 (0;6.8) | 0, 0 (0;16.1) |