FIG 1.

Tulathromycin does not alter the percentage of neutrophils recruited to the lower airways of zymosan-challenged calves. The percentages of neutrophils in the BAL fluid of control calves, sham-treated calves challenged with 50 mg zymosan (zym), and tulathromycin-treated (2.5 mg/kg s.c.) calves challenged with zymosan (zym + TUL) were enumerated at 3 h (A) and 24 h (B) using Diff-Quik staining and light microscopy. The values were not significantly different between any of the groups at 24 h postchallenge. Data are expressed as the group mean ± standard error of the mean (SEM) of the percent neutrophils of the total leukocyte population in the BAL fluid (n = 5 to 7/group). *, P < 0.05 versus the control group.