Volume 22, Number 9—September 2016
Letter
Specificity of Dengue NS1 Antigen in Differential Diagnosis of Dengue and Zika Virus Infection
Table
RT-PCR results for 65 persons with clinical samples tested during the acute phase of Zika virus infection, French Guiana, December 17, 2015–March 2, 2016*
Days from symptom onset to sample collection | No. cases | RT-PCR results, by clinical sample |
|||||||
---|---|---|---|---|---|---|---|---|---|
Serum only |
Urine only |
Serum and urine |
|||||||
No. samples | Ct, mean ± SD | No. samples | Ct, mean ± SD | No. samples | Ct, mean ± SD | ||||
0 |
8 |
5 |
31.8 ± 2.8 |
1 |
34.6† |
2 |
Serum: 28.6 ± 10.45; urine: 28.9 ± 11.3 |
||
1 |
12 |
4 |
29.9 ± 4.6 |
2 |
36.5 ± 0.3 |
6 |
Serum: 36.0 ± 1.7; urine: 33.6 ± 4.4 |
||
2 |
20 |
13 |
32.8 ± 3.0 |
1 |
33.7† |
6 |
Serum: 34.2 ± 3.6; urine: 33.0 ± 1.4 |
||
3 |
15 |
8 |
33.6 ± 3.6 |
2 |
34.2 ± 1.5 |
5 |
Serum:33.6 ± 2.8; urine: 34.1 ± 1.6 |
||
4 |
7 |
5 |
31.7 ± 2.4 |
1 |
28.9† |
1 |
Serum:32†; urine: 32† |
||
5 |
3 |
0 |
NA |
1 |
31.7† |
2 |
Serum: 35.1 ± 0.8; urine: 32.9 ± 3.9 |
||
Total | 65 | 35 | 32.5 ± 3.1 | 8 | 33.8 ± 2.6 | 22 | Serum: 33.6 ± 3.8; urine: 32.9 ± 3.8 |
*Ct, cycle threshold; NA, not applicable; RT-PCR, reverse transcription PCR.
†SD not determined.