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Table 4 Cycle threshold (Ct) values for the 1st WHO International Standard samples tested using the HIV/HCV/HBV/malaria NAT assay (Bio-Manguinhos)

From: Use of a NAT-based assay to improve the surveillance system and prevent transfusion-transmitted malaria in blood banks

Replicate Concentration tested
2.00E02 (Ct value) 1.00E02 (Ct value) 5.00E01 (Ct value) 2.50E01 (Ct value)
1 32.56 33.66 33.79 35.75
2 32.63 32.94 36.24 43.99
3 32.39 32.88 37.39 34.23
4 31.92 32.76 34.42 47.63
5 32.39 33.31 34.17 34.96
6 32.05 33.73 34.48 37.67
7 32.73 33.17 33.23 ND
8 33.1 33.31 33.64 35.39
Mean (SD) 32.47 (± 0.38) 33.22 (± 0.35) 34.67 (± 1.42) 38.52 (± 5.2)
  1. ND not detected, SD standard deviation