Figure 2.

a — Healthy striated muscle. b — Photomicrographs of striated diaphragmatic muscle from Calf B. Most myocytes are necrotic and have hypereosinophilic swollen sarcoplasm with fine or coarse vacuolation (v). Some myocytes have hypercontraction bands present. The endomysium is expanded by edema, fibrin (F), and patchy hemorrhage (H) intermingled with loose aggregates of degenerative leukocytes (arrows). Several small clusters of plump bacilli are present among interstitial debris. Photomicrographs courtesy of the Animal Healthy Laboratory, University of Guelph.