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SIV RNA+ cells in the penis and colon. The interval between the time of SIV inoculation and the time of tissue collection is indicated for each row. All panels show sections of tissues collected from animals inoculated with SIVmac251 hybridized with antisense SIV-specific riboprobes. Arrows, representative vRNA+ cells in each section. Bars = 20 μm (A, B), 50 μm (C), and 100 μm (D). A DAB label and hematoxylin counterstain were used.
