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Quantification of parasites in blood samples taken from a volunteer during a human experimental P. falciparum infection. Mean results from duplicate analyses are shown for real-time QT-NASBA (open circles) and real-time QT-PCR (solid squares). The results of quantification by the two techniques were significantly correlated (Spearman's ρ = 0.930; P < 0.01). Drug treatment was given at day 8.3 after infection, when parasites were detected by microscopy.
