TABLE 1 .
Serological test resultsa
| Subpopulationb | Median age (yr) (IQR)c | Total no. of individuals tested for ZIKV by ELISA | ZIKV IgM |
ZIKV IgG |
ZIKV PRNT |
CHIKV IgG |
DENV IgGd |
|||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n | % | n | % | n/total no. | % | n/total no. | % | n/total no. | % | |||
| HIV patients | ||||||||||||
| 2013 | 36.7 (16.4) | 96 | 0 | 0 | 7 | 7.3 | 7/96 | 7.3 | 52/84 | 61.9 | ||
| 2014 | 38.8 (17.8) | 89 | 0 | 0 | 2 | 2.3 | 6/89 | 6.7 | 57/82 | 69.5 | ||
| 2015 | 36.6 (17.4) | 92 | 2 | 2.2 | 16 | 17.4 | 1/92 | 1.1 | 46/68 | 67.6 | ||
| Total retrospective | 277 | |||||||||||
| HIV patients 2016 | 44.7 (15.4) | 263 | 2 | 0.8 | 139 | 52.9 | 31/61 | 50.8 | 22/263 | 8.4 | 88/110 | 80.4 |
| MC pregnancies 2015–2016 | 28.5 (10.8) | 19 | 1 | 5.3 | 18 | 94.7 | 14/15 | 93.3 | 3/19 | 15.8 | 0/1 | 0 |
| Non-MC pregnancies 2015–2016 | 28.9 (10.9) | 257 | 1 | 0.4 | 178 | 69.3 | 114/171 | 66.6 | 15/257 | 5.8 | 52/69 | 75.4 |
| Tuberculosis patients 2016 | 45.1 (22.2) | 55 | 2 | 3.6 | 47 | 85.5 | 14/20 | 70 | 4/55 | 7.3 | 8/8 | 100 |
| University employees 2016 | 33.8 (12.3) | 39 | 2 | 5.1 | 19 | 48.7 | 14/32 | 43.8 | 3/39 | 7.7 | 8/18 | 44.4 |
| Total 2015–2016 | 633 | 8 | 1.3 | 401 | 63.3 | 187/299 | 62.5 | 47/633 | 7.4 | 156/206 | 75.7 | |
| Total study | 910 | |||||||||||
a
The number of specimens (n) and percentage of specimens positive for antibodies against Zika (ZIKV), Chikungunya (CHIKV), or dengue (DENV) virus in ELISA or plaque-reduction neutralization test (PRNT) are shown.
b
MC, microcephaly.
c
Interquartile range (IQR) shown in parentheses in the table.
d
Including only ZIKV-negative specimens due to cross-reactivity of the DENV ELISA with ZIKV antibodies.