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Table 4 Inter and Intra Assay Variation between Abbott Real Time HIV-1 and GeneXpert HIV-1 Quant

From: GeneXpert HIV-1 quant assay, a new tool for scale up of viral load monitoring in the success of ART programme in India

NHP spiked with high VL plasma NHP spiked with viral stock
HIV-1 viral load (copies/ml) Coefficient of variation (% CV) HIV-1 viral load (copies/ml) Coefficient of variation (% CV)
Inter-Assay Intra-Assay Inter-Assay Intra-Assay
  Abbott GeneXpert Abbott GeneXpert   Abbott GeneXpert Abbott GeneXpert
200 4.11 1.97 4.77 3.34 40 1.53 6.96 4.28 2.33
2000 1.08 1.45 1.42 0.31 4000 1.03 3.17 0.77 10.66
20,000 0.86 2.74 2.51 0.97 40,000 0.28 6.84 0.42 0.96
2,00,000 0.57 0.36 1.74 1.11 4,00,000 0.60 3.00 0.49 2.89
20,00,000 0.81 0.58 0.78 0.45 40,00,000 0.69 0.78 0.33 0.78