Table 3.
Distribution of phylogenetic groups and virulence genes of avian pathogenic E. coli.
| Phylogenetic group | No. of isolates (%) | No. of isolates with each virulence gene (%) |
O Serotypes (no. of isolates) | ||||
|---|---|---|---|---|---|---|---|
| hlyF | iroN | iss1 | iutA | ompT | |||
| A | 18 (22.8) | 16 (88.9) | 11 (61.1) | 11 (61.1) | 14 (77.8) | 16 (88.9) | O3 (3), O8 (1), O9 (1), O78 (8), O99 (1), O103 (1), Ogp14 (1)2, ONT (2)3 |
| B1 | 18 (22.8) | 18 (100.0) | 15 (83.3) | 12 (66.7) | 17 (94.4) | 16 (88.9) | O37 (1), O76 (1), O78 (4), O86 (1), O88 (1), O115 (2), O132 (1), O173 (1), Ogp6 (1)4, ONT (5) |
| B2 | 6 (7.6) | 6 (100.0) | 6 (100.0) | 6 (100.0) | 6 (100.0) | 6 (100.0) | O2 (5), O104 (1) |
| D | 37 (46.8) | 34 (91.9) | 31 (83.8) | 33 (89.2) | 35 (94.6) | 33 (89.2) | O2 (2), O8 (1), O9 (1), O11 (1), O25 (2), O45 (2), O53 (7), O60 (1), O78 (4), O86 (2), O111 (1), O132 (1), O142 (2), O146 (1), O158 (1), O161 (1), O166 (1), O174 (3), Ogp8 (1)5, ONT (2) |
| 79 | 74 (93.7) | 63 (79.7) | 62 (78.5) | 72 (91.1) | 71 (89.9) | ||
1
There were significant differences (P < 0.05) between A and B1 and between B2 and D.
2
O62 or O68.
3
Not grouped.
4
O46 or O134.
5
O107 or O117.