Spectral imaging and colocalization of double-label immunohistochemistry slides of spleen and colon.

<p>Immunofluorescence with SIV nucleic acid (green), Ham56+ macrophages (red), and coexpression (yellow, arrows) demonstrate that infected macrophages are readily evident in SIVmac239-infected monkeys (<b>A, B, arrows</b>), particularly within the colon (<b>B</b>), but are absent in spleen and colon from SIVΔ<i>vpx</i>-infected monkeys (<b>C, D</b>). Snowflake symbols in <b>C</b> denote autofluorescence in red pulp macrophages. Original magnification 40× (<b>A</b>–<b>D</b>).