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Immunohistochemical demonstration of Hemophilus somnus, Mycoplasma bovis, and Manneheimia hemolytica in heart and lung tissues of feeder cattle dying in feedlots
| H. somnus | M. hemolytica | M. bovis | ||||
|---|---|---|---|---|---|---|
| Group | Heart | Lung | Heart | Lung | Heart | Lung |
| Myocarditis (n = 92) | 70 | 5 | 0 | 1 | 4 | 6 |
| Pneumonia (n = 35) | 0 | 9 | 0 | 17 | 0 | 9 |
| Noninfectious (n = 44) | 0 | 0 | 0 | 0 | 0 | 0 |
