Khachatryan, Artashes R.; Besser, Thomas E.; Hancock, Dale D.; Call, Douglas R. (United States of America)
Applied and Environmental Microbiology (2006)
Supplement experiments involved 27 neonatal calves that were sequentially assigned to one of the three groups. All calves originated from the WSU dairy and were housed in individual pens. One group received the complete dietary supplement without oxytetracycline (Pennox-50), while a second group received the same dietary supplement with Pennox-50. A third group did not receive any supplement. Calves received 1 tablespoon (15 to 20 g) of dietary supplement per day, which was added directly to the milk at the morning feeding.
Each calf was sampled once a week for 3 months. Fecal samples (1 g) were collected with sterile tongue depressors from the floor or rectum and placed in sterile bags.
AST Method: Agar Dilution
Reference explicitly reports AST breakpoints: True
Reference reports using a MIC table: False
Is Excluded: False
| Country | Sub-Region | Sub-Region Detail |
|---|---|---|
| United States of America | Other (Other) | Washington State |
| ID | Note | Resolution |
|---|
| Title | Host | Host | Production Stage | Description | ROs |
|---|---|---|---|---|---|
| dietary supplement with oxytetracycline | Cattle | Other | None | dietary supplement was prepared by mixing 8.3 kg of dry skim milk, 156 g of vitamin D premix, 241 g of vitamin A-30 premix and 412 g of Pennox-50 (oxytetracycline hydrochloride, equivalent to 110 g/kg; Pennfield Animal Health, Omaha, NE) | 1 |
| dietary supplement without oxytetracycline | Cattle | Other | Farm | dietary supplement was prepared by mixing 8.3 kg of dry skim milk, 156 g of vitamin D premix, and 241 g of vitamin A-30 premix | 1 |