Figure 1.

(A) Mild (<50%) grade of multilayered cellular infiltrates reflected visually in scanned lung section; lesions with fewer cell infiltrates are not evident in the scans. (B) Moderate (50–75%) grade of multilayered cellular infiltrates reflected visually in scanned lung section. (C) Severe (75–100%) grade of multilayered cellular infiltrates reflected visually in scanned lung section. Treated right lower lobe (upper panel) and “untreated control” left lower lobe (lower panel) of the same animal are illustrated in each case. CARDS = community-acquired respiratory distress syndrome; LLL = left lower lobe; MP = Mycoplasma pneumoniae; RLL = right lower lobe.