| Antimicrobial Treatment |
Compares calves treated with ceftiofur within 5 days of sampling with untreated calves. All calves belongd to Group 3 (antimicrobial therapy available, only un-medicated milk replacer administered). Data are from Day-14 and Day-28 samples. |
Cattle |
Pre-weaned Calves |
12 |
| Housing Type |
Group 1 (housed in isolated hutches outside of the calf ranch which had never before housed calves) vs Group 2 (housed within the calf ranch). Neither group received antimicrobial therapy or medicated milk replacer. Data is from Day 28. |
Cattle |
Pre-weaned Calves |
12 |
| Antimicrobial Therapy |
Group 2 vs Group 3 (see Table 1 for criteria for clinical diagnosis and specific AMs available). Both groups were housed on a calf ranch. Data is from Day 14. AMR is for amoxicillin-clavulanic acid. |
Cattle |
Pre-weaned Calves |
1 |
| Antimicrobial Use |
Group 2 vs Group 4 (see Table 1 for therapeutic indications, milk replacer contains tetracycline hydrochloride (22 mg/kg body weight/day) and neomycin sulfate (22 mg/kg/day)). Both groups were housed on a calf ranch. Data is from Day 14. |
Cattle |
None |
6 |
| Housing Type |
Group 1 (housed in isolated hutches outside of the calf ranch which had never before housed calves) vs Group 2 (housed within the calf ranch). Neither group received antimicrobial therapy or medicated milk replacer. Data is from Day 14. |
Cattle |
Pre-weaned Calves |
12 |
| Antimicrobial Therapy |
Group 2 vs Group 3 (see Table 1 for criteria for clinical diagnosis and specific Ams available). Both groups were housed on a calf ranch. Data is from Day 14. |
Cattle |
Pre-weaned Calves |
11 |
| Antimicrobial Use |
Group 2 vs Group 4 (see Table 1 for therapeutic indications, milk replacer contains tetracycline hydrochloride (22 mg/kg body weight/day) and neomycin sulfate (22 mg/kg/day)). Both groups were housed on a calf ranch. Data is from Day 28. |
Cattle |
None |
6 |
| Antimicrobial Therapy |
Group 2 vs Group 3 (see Table 1 for criteria for clinical diagnosis and specific Ams available). Both groups were housed on a calf ranch. Data is from Day 28. AMR is for amoxicillin-clavulanic acid. |
Cattle |
Pre-weaned Calves |
1 |
| Antimicrobial Therapy |
Group 2 vs Group 3 (see Table 1 for criteria for clinical diagnosis and specific Ams available). Both groups were housed on a calf ranch. Data is from Day 28. |
Cattle |
Pre-weaned Calves |
11 |
| Antimicrobial Treatment |
Compares calves treated with ceftiofur within 5 days of sampling with untreated calves. All calves belonged to Group 4 (AM therapy available, milk replacer with tetracycline HCl and neomycin sulfate administered). Data are from Day-14 and Day-28 samples. |
Cattle |
Pre-weaned Calves |
12 |
| Antimicrobial Use |
Group 2 vs Group 4 (see Table 1 for therapeutic indications, milk replacer contains tetracycline hydrochloride (22 mg/kg body weight/day) and neomycin sulfate (22 mg/kg/day)). Both groups were housed on a calf ranch. Data is from Day 28. |
Cattle |
Pre-weaned Calves |
6 |
| Antimicrobial Use |
Group 2 vs Group 4 (see Table 1 for therapeutic indications, milk replacer contains tetracycline hydrochloride (22 mg/kg body weight/day) and neomycin sulfate (22 mg/kg/day)). Both groups were housed on a calf ranch. Data is from Day 14. |
Cattle |
Pre-weaned Calves |
6 |