Volume 25, Number 6—June 2019
Performance of 2 Commercial Serologic Tests for Diagnosing Zika Virus Infection
|Test||Positive for dengue virus, collected before 2013||Positive for chikungunya virus, collected in 2014||Negative for Zika, dengue, and chikungunya viruses, collected at end of 2015|
|Euroimmun IgG test|
|False positivity rate, % (pos/pos + neg)||40% (14/35)||45.8% (11/24)||11.9% (5/42)|
|IgG S/C ratio of false-positive IgG, mean (range)
|Dia.Pro IgG test|
|False positivity rate, % (pos/pos + neg)||40% (14/35)||58.6% (17/29)||21.4% (9/42)|
|IgG S/C ratio of false-positive IgG, mean (range)||9.2 (2.5–14.4)||3.1 (1.1–7.7)||4.3 (1.1–10.1)|
*Neg, negative; pos, positive.
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