TABLE 3.
Serogroups and virulence genes of E. coli isolates from diseased chickens and swinea
| E. coli isolate source and O group(s) | No. of isolates | No. with virulence factor
|
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| K1 | ISS | Tsh | HlyE | STa | Stx1 | CNF1 | CNF2 | K99 | F107 | ||
| Chickens | |||||||||||
| O1 | 2 | 0 | 1 | 1 | 0 | ||||||
| O25 | 4 | 4 | 4 | 4 | 0 | ||||||
| O78 | 45 | 2 | 45 | 45 | 0 | ||||||
| O84 | 6 | 0 | 6 | 6 | 0 | ||||||
| O88 | 6 | 2 | 6 | 3 | 0 | ||||||
| O160 | 1 | 0 | 0 | 0 | 0 | ||||||
| NT | 7 | 1 | 7 | 7 | 0 | ||||||
| Total | 71 | 9 | 69 | 66 | 0 | ||||||
| Swine | |||||||||||
| O1 | 0 | 1 | 0 | 0 | 0 | 0 | |||||
| O21 | 0 | 0 | 1 | 0 | 0 | 0 | |||||
| O101 | 0 | 1 | 0 | 1 | 1 (O153) | 0 | |||||
| O9, O88, O153 and O171 | 0 | 1 (O9) | 0 | 1 (O153), 1 (O171) | 0 | 0 | |||||
| O19, O25, O91, O142, O149, O157, and O159 | 0 | 2 (O91) | 0 | 1 (O159) | 0 | 1 (O149) | |||||
| O33, O35, O54, O79, O114, O160, X3, X13, and X28 | 1 (O114) | 1 (X13) | 0 | 0 | 0 | 0 | |||||
| NT | 0 | 3 | 0 | 2 | 0 | 0 | |||||
| Total | 1 | 9 | 1 | 6 | 1 | 1 | |||||
a
K1, capsule antigen K1; ISS, increased serum survival factor; Tsh, temperature-sensitive hemagglutination; HlyE, hemolysin E; STa, heat-stable enterotoxins; Stx1, Shiga toxin 1; CNF1 and CNF2, cytotoxic necrotizing factors 1 and 2; K99, fimbrial type 5; F107, fimbrial type 107; X, experimental O group; NT, nontypeable.