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. 2004 Feb 17;101(9):3017–3022. doi: 10.1073/pnas.0308677101

Table 2. Cell-associated viral load and detection of vaccine and challenge forms of SIV by PCR 7-8 days after challenge.

SIVΔnef-infected monkeys
Control nonvaccinated monkeys
Tissue examined 10124 10130 10674 10678
PBMC 1(V) 256 256
Palatine tonsil 4(V/C) 4(V) 4,096(C) 4,096(C)
Spleen 16(V) 64(V) 4,096 1,024
LN axillary 32(V) 32(V) 128 1024
LN mesenteric 8(V) 8(V) 4096 256
LN submandibular 8(V) 128(V) 1,024 1,024
LN retropharyngeal 2(C) 16(V) 4,096 1,024
Thymus 1(V) 128 2

Cell-associated viral load expressed as infectious units per 106 mononuclear cells. Characterization of reisolates by PCR are shown in parentheses.—, virus isolation negative; V, vaccine virus; C, challenge virus; nd, not done. In the control animals, we performed PCR on only one to two reisolates per monkey, as indicated, to verify the presence of wild type challenge virus.