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Foamy virus RNA levels in permissive tissues of healthy RM. Results of qRT-PCR for SFV RNA in tissues from five SIV− RM are shown. Each bar represents the mean viral load from three independent qRT-PCRs for one animal. Viral loads were normalized to cell equivalents by qRT-PCR for 18S RNA. Error bars represent the standard deviations. All SFV-seronegative RM were PCR negative for SFV RNA in all tissues examined. ND, not determined. *, undetectable.
