Table 2. High-risk feeder heifer treatment failure rate by culture status and timing of sample.
| Treatment Failure Rate by Pathogen and Sample Period | |||||
|---|---|---|---|---|---|
| Culture Positive | Culture Negative | ||||
| Pathogen | Sample Period | #Failures/ Total # | %Treatment Failure | #Failures/Total # | %Treatment Failure |
| M. haemolytica | Day-0 | 55/112 | 49 | 366/914 | 40 |
| 1St-BRD Treatment | 69/136 | 51 | 148/263 | 56 | |
| P. multocida | Day-0 | 46/108 | 43 | 375/918 | 41 |
| 1St-BRD Treatment | 17/31 | 55 | 200/368 | 54 | |
| M. bovis | Day-0 | 3/10 | 30 | 418/1016 | 41 |
| 1St-BRD Treatment | 83/146 | 57 | 134/253 | 53 | |
| H. somni | Day-0 | 3/7 | 43 | 418/1019 | 41 |
| 1St-BRD Treatment | 15/25 | 60 | 202/374 | 54 | |