Table 2.
PCR, ELISA, and FRNT results for potential ZIKV cases in the TIRS cohort observed by symptomatic active surveillance or from seroconversion in annual serological surveillance (passive surveillance) from 2021 and 2022
| Serological test | 2021 Active Surveillance | 2022 Active Surveillance | 2021–2022 Passive Surveillance | Total |
|---|---|---|---|---|
| ZIKV RT-qPCR+ | 0 | 4 | NA | 4 |
| Anti-ZIKV IgM+ | 17 | 48 | NA | 65 |
| FRNT | ||||
| ZIKV | 4 | 14 | 3 | 21 |
| Cross-reactive | 5 | 16 | 0 | 21 |
| DENV | 6 | 10 | 0 | 16 |
| No exposure observed | 2 | 8 | 0 | 10 |
DENV = dengue virus; FRNT = focus reduction neutralization test; NA = not applicable; RT-qPCR = real-time quantitative polymerase chain reaction; TIRS = Targeted Indoor Residual Spraying; ZIKV = Zika virus.