Swine | Sows
1
In-feed chlortetracycline use, obtained from monthly listings of feedgrade antibiotics used (via formulations)(January 2004 - December 2007). MMD (mean monthly dosage) > 0.04 vs MMD = 0 g/swine kg-month. Both groups received other AMs. Samples = composite
| Resistance | Microbe | Outcome | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tetracycline / | Escherichia coli |
|