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Transmission electron micrographs illustrating apoptotic tilmicosin-treated PMNs (N) in close apposition to (arrowheads) or within (arrows) phagocytic vacuoles of bovine macrophages (M). PMNs exhibit ultrastructural features characteristic of apoptosis, including nuclear membrane delamination, chromatin condensation, intact cytoplasmic granules, and vacuolation of the cytoplasm. Bar = 1 μm.
