Fig. 5
Cytology of bronchoalveolar lavage fluid from 2 calves, sampled before (a and c) and 24 h after aerosolization of either 1012 CFU-equivalents of Staphylococcus aureus and Escherichia coli lysate (b) or phosphate-buffered saline (d). The sample obtained after administration of lysate (b) contains many neutrophils whereas the other samples (a, c, d) contain mainly macrophages and lymphocytes. Cytocentrifuge preparation, Wright’s stain. Bar = 25 μm