FIG. 6.

Histopathology and influx of macrophages and T cells in the lungs of mice infected with wt RSV or mG RSV and treated or mock-treated with triamcinolone from the same experiment as shown in Fig. 5. Lungs were harvested 4 days postinfection and were fixed and embedded in paraffin. Thin-layer sections were stained with hematoxylin and eosin (A), antibody specific to the F4/80 antigen (B), which is a marker for macrophages and other myeloid cells, or antibody specific to CD3, a marker for T cells (C). Scores for all of the mice in the experiment are shown in Table 1. For each virus and treatment combination, the sections shown in A, B, and C represent adjacent tissue slices.