Figure 3. . . Micrographs of a section of lung from a 2-year-old ferret that died of acute dyspnea. A) Image shows moderate bronchointerstitial pneumonia with severe hyperplasia of bronchiole-associated lymphoid tissue around a narrowed airway lumen; original magnification ×40. B) Immunohistochemical analysis conducted with antibodies against mycoplasmas demonstrates intense labeling along the apical border of the ciliated respiratory epithelium; original magnification ×40. C) Confocal scanning laser microscopy conducted with antibodies against mycoplasmas demonstrates intense fluorescent labeling along the brush border of the bronchial epithelial cells; original magnification ×40.