Figure 4.

Cellular differentials in bronchoalveolar lavage. Total number of (A) alveolar macrophages (AM), (B) polymorphonuclear cells (PMN), and (C) lymphocytes recovered by from rats 1, 3, 5, 7, 14, and 28 days after intratracheal-instillation with 1.25, 5.0, or 12.5 μg of QD-NH₂ or QD-COOH. * significantly different from all groups; ⁺ significantly different from saline, 1.25 μg, and 5.0 μg groups; ^# significantly different from saline and 1.25 μg groups; ^@ significantly different from saline, 1.25 μg groups, and QD-NH₂ at 5.0 μg; ^X significantly different from saline, 1.25 μg groups, and QD-COOH at 5.0 μg; ^ significantly different from saline (p<0.05).