FIG. 6.
Brown-Hopps stain of bronchioles and alveoli from lung sections at 168 h postinfection. (a and c) Doripenem and meropenem treatment, respectively (magnification, ×4). (b, d, and f) Doripenem, meropenem, and imipenem treatment, respectively (magnification, ×100). (e) Imipenem treatment (magnification, ×20). Note focal areas of interstitial fibroblast infiltrates, macrophages, neutrophils, and septal thickening.