Agga, Getahun E. and Schmidt, John W. and Arthur, Terrance M. (United States of America)
Microbial Drug Resistance (2016)
The study population consisted of 369 cows born between 2002 and 2006, distributed among four breeding cohorts that had 518 beef cows. A breeding cohort was defined as a group of cows kept on communal pasture. The ceftiofur-treated group consisted of 162 cows that were treated with ceftiofur as well as other therapeutic antimicrobials. The nonantimicrobial-treated group consisted of 207 cows that never received therapeutic antimicrobial treatment. Ceftiofur-treated cows were administered ceftiofur crystalline-free acid (Excede; Zoetis, Inc., Kalamazoo, MI) or ceftiofur sodium (Naxcel; Zoetis, Inc.).
Fecal grab samples were collected from individual cows per rectum by using obstetrical gloves when cows were restrained in a squeeze chute for pregnancy testing from September to November 2014. Samples were cultured on erythromycin-selective media.
AST Method: Broth Microdilution
Reference explicitly reports AST breakpoints: False
Reference reports using a MIC table: False
Is Excluded: False
| Country | Sub-Region | Sub-Region Detail |
|---|---|---|
| United States of America | None | None |
| United States of America | Nebraska (State) | None |
| ID | Note | Resolution |
|---|
| Title | Host | Host | Production Stage | Description | ROs |
|---|---|---|---|---|---|
| Ceftiofur Use | Cattle | Beef Cows | Farm | Ceftiofur-treated group (treated with ceftiofur + other therapeutic antimicrobials), vs nonantimicrobial-treated group (cows that never received therapeutic antimicrobial treatment). Ceftiofur administered as either ceftiofur crystalline-free acid (Excede | 5 |
| Ceftiofur Use | Cattle | Beef Cows | Farm | Cows treated with ceftiofur. Samples were cultured on erythromycin-selective media. (Averaged across Birth Cohorts) | 1 |