Table 1.
Summaries of activities performed during 28 days of the study course.
| Activities | Pre-Treatment | Post-Treatment | Involved Group * | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Day 0 | 4 | 7 | 13 | 16 | 21 | 22 | 24 | 28 | ||
| 1. Calf examination, weighing, and room assignment | All groups | |||||||||
| 2. C. jejuni inoculation | All | |||||||||
| 3. M. haemolytica inoculation | Low and high- dose BRD groups | |||||||||
| 4. Enrofloxacin injection | All, except the control | |||||||||
| 5. Fecal sample collection | All | |||||||||
| 6. Lung examination | All | |||||||||
* Five groups (each consisting of seven calves): control, healthy-low dose, BRD/sick-low dose, healthy-high dose, and BRD/sick-high dose groups. Each shaded box indicates the day that the respective activity was conducted.