TABLE 3.
Erythromycin-resistant enterococci by swine production stage
| Species isolated (n) | No. of erythromycin-resistant isolates (%) by stage and farm
|
||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gestation
|
Farrowing
|
Suckling
|
Nursery
|
Finishing
|
|||||||||||
| A | B | C | A | B | C | A | B | C | A | B | C | A | B | C | |
| E. casseliflavus (2) | 1 (50.0) | 1 (50.0) | 0 (0) | 0 (0) | 0 (0) | ||||||||||
| E. durans (25) | 1 (4.0) | 1 (4.0) | 2 (8.0) | 1 (4.0) | 0 (0) | 13 (52.0) | 0 (0) | 7 (28.0) | 0 (0) | ||||||
| E. faecalis (30) | 3 (10.0) | 1 (3.3) | 10 (33.3) | 3 (10.0) | 1 (3.3) | 2 (6.7) | 8 (26.7) | 0 (0) | 0 (0) | 2 (6.7) | 0 (0) | ||||
| E. faecium (11) | 1 (9.1) | 1 (9.1) | 4 (36.4) | 1 (9.1) | 1 (9.1) | 2 (18.2) | 0 (0) | 1 (11.1) | 0 (0) | 0 (0) | |||||
a
Percent erythromycin-resistant isolates by species resistance was calculated by dividing the number or erythromycin resistant-isolates per species by the total number of erythromycin-resistant isolates per farm.