Infiltration of eosinophils and other leukocytes after Sephadex beads (A) and thioglycollate injections (B). (A) Lung tissues of wild-type (+/+) and eotaxin null (−/−) mice were examined for eosinophils at 6 and 24 hours after mice received Sephadex G50 (superfine) beads by intravenous injection. Data represent the mean ± SEM from three fields for each mouse and from 5 mice of each group. (B) Cells were collected by peritoneal lavage 24 hours after intraperitoneal injection of thioglycollate into mice and stained by Diff-Quick staining. Data represent the mean ± SEM from at least six high-power fields from 6 mice of each phenotype.