TABLE 1.
Origin | No. of isolates | No. of copper-resistant isolates (%) | CuSO4 (ppm) in feed |
---|---|---|---|
Pig | 59 | 45 (76) | 165/25a |
Broiler | 29 | 10 (34) | 20 |
Calve | 32 | 5 (16) | 2 |
Sheep | 22 | 0 (0) | 0 |
Human | 29 | 3 (10) | 0 |
That is, 165 ppm for weaners and 25 ppm for slaughter pigs.