Figure 4. . . Transmission electron micrograph of the lung from a 2-year-old ferret that died of acute dyspnea, showing loss of cilia in bronchial epithelial and cellular degeneration characterized by swelling of endoplasmatic reticulum, vacuolization of mitochondria with loss of christae, and intranuclear chromatin dispersion. Attached to the apical surface of a ciliated cell is a 0.8-μm pleomorphic mycoplasma-like organism (arrow). Scale bar = 0.5 µm.