Table 3.

BALF cytology of rats exposed to TiO₂ nanoparticles

Cell type	Day 1 post-exposure		Day 7 post-exposure		Day 15 post-exposure
	Control	Treated	Control	Treated	Control	Treated
Total cell	5.246	5.361	4.166	4.230	4.650	4.780
Macrophage	5.230	5.356	4.153	4.221	4.640	4.716
Neutrophil	0.003	0.004	0.008	0.005	0.004	0.008
Lymphocyte	0.013	0.002	0.005	0.004	0.006	0.057

Note: Rats were treated with 0 (control) or 11.39 mg/m³ (Treatment) TiO₂ nanoparticles by inhalation for 2 weeks. Lung lavage was performed on 1,7, and 15 days post-exposure.

Mean values {(Cell counts/ml BALF) × 10⁵} of the indicated animal groups are shown.