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Percentage (No.) of cattle that had been treated multiple times as a result of bovine respiratory disease (BRD).
| Percentage of BRD cases by number of antimicrobials treated (No. animals) |
|||||||
| Bacterial species isolated | None | Once | Twice | Three | Four | Five | Six |
| Mannheimia haemolytica | 33 (48) | 39 (58) | 17 (25) | 7 (11) | 3 (4) | 1 (1) | – |
| Pasteurella multocida | 34 (24) | 21 (15) | 11 (8) | 7 (5) | 13 (9) | 10 (7) | 3 (2) |
