Table 1.

Changes in BAL indicators in rats 2 hr after exposure to O₃.^a

Parameter	Air	2.0 ppm	5.0 ppm
Protein, μg/mL	96.5 ± 3.94	159.0 ± 8.91*	2,001.0 ± 348.0*
N-Acetylglucosaminidase	2.4 ± 0.28	3.82 ± 0.34*	18.0 ± 1.14*
Lysozyme, μg/mL	85.2 ± 1.71	79.5 ± 1.91*	71.4 ± 4.31*
Total cells, × 1,000/mL	37.2 ± 5.49	28.2 ± 2.36	30.9 ± 2.89
Neutrophils, %	0.60 ± 0.09	2.33 ± 0.87*	22.8 ± 4.47*
Ciliated cells, %	0.23 ± 0.16	6.07 ± 1.61*	40.4 ± 7.93*

^aResults presented here are mean ± SE for six rats/group.

^*Significantly different (p ≤ 0.05) by Student’s t-test.