Reduction in thioflavine-S staining 3 d after anti-Αβ antibody injections. Thioflavine-S staining is shown in frontal cortex (A, B) and hippocampus (C, D). Mice in A andC received control antibody, whereas those inB and D received anti-Αβ antibody. Magnification, 40×. Scale bar, 120 μm. Orientation and locations of major subregions are as in Figure 2, B andD. A high-resolution color version of this micrograph can be obtained by e-mail from D. Morgan (dmorgan@hsc.usf.edu).