FIG. 6.

Character of the pulmonary inflammation. BAL was performed at day 5 (A), 7 (B), or 9 (C) after MHV-1 infection. BAL fluid cells were cytospun and subsequently stained with Diff-Quik. The percentages of lymphocytes, macrophages, and neutrophils were determined from counts obtained under a light microscope. No eosinophils were observed in any of the mice. The results are expressed as the mean of four mice per group. The error bars indicate the standard deviations. The experiment was performed twice with similar results. *, P < 0.05 as determined by ANOVA for the comparisons indicated.