TABLE 1.
Genotypes and phenotypes of fedA+ E. coli
| fedA gene | No. of strains that were:
|
|||||
|---|---|---|---|---|---|---|
| Identi- fied | Reactive with 6C7/C1a | ETECb | STECc | STEC/ ETECd | Toxin negative | |
| fedA | 15 | 0 | 3 | 4 | 8 | 0 |
| fedA.1 | 56 | 0 | 6 | 4 | 43 | 3 |
| fedA.2 | 22 | 16 | 18 | 0 | 3 | 1 |
| fedA.3 | 14 | 13 | 13 | 0 | 1 | 0 |
| fedA.7 | 16 | 12 | 13 | 1 | 2 | 0 |
| fedA.8 | 2 | 0 | 2 | 0 | 0 | 0 |
| fedA.—e | 13 | 9 | 9 | 0 | 4 | 0 |
a
F18ac-specific monoclonal antibody.
b
ETEC strains were STa, STb, or LT positive.
c
STEC strains were Stx2e positive.
d
STEC and ETEC strains were Stx2e and STa, STb, or LT positive.
e
Unique fedA genes were identified by SSCP analysis for 13 strains, 11 of which were designated F18ac+ and 2 of which were designated F18ab+.