TABLE 1.
Proportion of herds/flocks in which E. coli was isolated from cefotaxime-containing medium and distribution of phenotypically inferred phenotypes
| Host | Growth in cefotaxime-containing medium |
Inferred phenotype |
|||||||
|---|---|---|---|---|---|---|---|---|---|
| ESBL |
AmpC |
ESBL+AmpC |
|||||||
| n | % | 95% CI | n | % | n | % | n | % | |
| Beef cattle (n = 104) | 10 | 9.6 | 4.1–15.2 | 9 | 8.7 | 1 | 1.0 | 0 | 0.0 |
| Dairy cattle (n = 82) | 27 | 32.9 | 23.8–42.1 | 20 | 24.4 | 5 | 6.1 | 2b | 2.4 |
| Sheep (n = 114) | 8 | 7.0 | 2.8–11.2 | 7a | 6.1 | 1 | 0.9 | 1a | 0.9 |
| Total (n = 300) | 45 | 15.0 | 11.2–18.9 | 36 | 12.0 | 7 | 2.3 | 3 | 1.0 |
a
In one sheep flock, two of the three isolates characterized had an ESBL phenotype and another isolate had the ESBL+AmpC phenotype.
b
Only one was confirmed as ESBL+AmpC by WGS analyses (see the text).