Role of FcαRI (CD89) in PMN-mediated phagocytosis of fungi. PMN were cultured with C albicans in medium alone (A and C) or in the presence of (A77 × αCandida) BsAb (B and D). Phagocytosis was analyzed microscopically with (A and B) showing representative photographs or by flow cytometry (C and D), plotting FITC-fluorescence (arbitrary units on a logarithmic scale) against the relative cell number. These experiments were repeated three times yielding essentially identical results.