Table 5.
Proportion of calves PCR positive on deep nasopharyngeal swab by experimental treatment group: treatment (TX) n = 17, control (CON) n = 11
| Item | Deep nasopharyngeal swab number1 |
|||||||
|---|---|---|---|---|---|---|---|---|
| 1 |
2 |
3 |
4 |
|||||
| TX | CON | TX | CON | TX | CON | TX | CON | |
| Pasteurella multocida, no. (%) | 5 (29) | 0 (0) | 1 (6) | 0 (0) | 7 (41) | 3 (27) | 12 (71) | 5 (45) |
| Mannheimia haemolytica, no. (%) | 3 (18) | 0 (0) | 4 (24) | 4 (36) | 7 (41) | 6 (55) | 7 (41) | 4 (36) |
| Mycoplasma bovis, no. (%) | 0 (0) | 0 (0) | 0 (0) | 1 (9) | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| Coronavirus, no. (%) | 0 (0) | 0 (0) | 0 (0) | 0 (0) | 0 (0) | 1(9) | 8 (47) | 8 (73) |
1
Swab 1: collected upon arrival to livestock laboratory, 7 d before challenge. Swab 2: collected 1 d before challenge (baseline, d −1). Swab 3: collected before TX when at least 1 cm2 of consolidation was observed and ≥6 h had elapsed since challenge. Swab 4: collected following final examination on d 14, before euthanasia.