Jacob, Megan E.; Fox, J. Trent; Nagaraja, T. G.; Drouillard, James S.; Amachawadi, Raghavendra G.; Narayanan, Sanjeev K. (United States of America)
Foodborne Pathogens and Disease (2010)
Twenty crossbred heifers were randomly allocated to four treatments (five animals per treatment) and housed in individual pens. All animals within a treatment were penned next to each other with an empty pen between them to reduce cross contamination. Cattle were fed a standard steam-flaked corn-based high-grain diet (83%) with 6% alfalfa hay and without in-feed antimicrobials except monensin which was witheldfor the previous 2 weeks. The treatment groups included 1X NRC recommended copper+ 1X NRC recommended zinc, 10X copper + 1X zinc, 1X copper+10X zinc, or 10X cooper+10X zinc.
Approximately 20g of feces were collected from the rectum of each animal on days 0, 14, and 32 of the feeding period.
AST Method: None
Reference explicitly reports AST breakpoints: False
Reference reports using a MIC table: True
Is Excluded: False
| Country | Sub-Region | Sub-Region Detail |
|---|---|---|
| United States of America | None | None |
| ID | Note | Resolution |
|---|
| Title | Host | Host | Production Stage | Description | ROs |
|---|---|---|---|---|---|
| Antimicrobial Use | Cattle | Heifers | Farm | The four treatments of the study were combintions of 1X NRC recommended copper (10mg/kg diet) and 1X zinc (30 mg/kg diet) and 10X these doses. | 1 |