Representative images of cytospin-stained lung BAL cells after exposure to 25 mg/m3 of galvanized spot welding fume in the presence of glue (A, B) or anti-spatter spray (C, D) for 4 h/day for 8 days: (A) galvanized spot welding fume with glue, 1-day post-exposure; (B) galvanized spot welding fume with glue, 7-day post-exposure; (C) galvanized spot welding fume with anti-spatter, 1-day exposure; (D) galvanized spot welding fume with anti-spatter, 7-day post-exposure. Asterisks indicate neutrophils; arrows point to particles within macrophages; magnification is 40×.