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. 2016 May 10;43(3):158–167. doi: 10.1159/000446219

Table 6.

Results of the 2015 EQA study for WNVa

Virus Copies/ml NAT assay
A B C D E
WNV L1 316 18/18 (100%) 8/8 (100%) 16/16 (100%) 12/12 (100%) 2/2 (100%)
100 18/18 (100%) 8/8 (100%) 16/16 (100%) 12/12 (100%) 2/2 (100%)
31 16/18 (88.9%) 8/8 (100%) 16/16 (100%) 12/12 (100%) 2/2 (100%)
10 9/18 (50%) 6/8 (75%) 16/16 (100%) 9/12 (75%) 2/2 (100%)

WNV L2 10,000 18/18 (100%) 8/8 (100%) 16/16 (100%) 12/12 (100%) 2/2 (100%)
1,000 18/18 (100%) 8/8 (100%) 16/16 (100%) 12/12 (100%) 2/2 (100%)
100 17/17 (100%) 8/8 (100%) 16/16 (100%) 12/12 (100%) 2/2 (100%)
10 7/18 (38.9%) 8/8 (100%) 13/16 (81%) 8/12 (67%) 2/2 (100%)
a

Cumulative results expressed as number of positives/tested (% of positivity) obtained with the five different NAT assays.