Table 2.
Cases with positive anti-ZIKV neutralizing antibodies and anti-DENV IgM in cord serum
| Case no. | Neonates group | Anti-ZIKV IgM ELISA | Anti-DENV IgM ELISA | ZIKV-DENV PRNT90* | ||||
|---|---|---|---|---|---|---|---|---|
| ZIKV | DENV-1 | DENV-2 | DENV-3 | DENV-4 | ||||
| 1 | CA | Negative | Negative | 20 | < 10 | < 10 | < 10 | < 10 |
| 2 | Non-CA | Negative | Negative | 10 | < 10 | < 10 | < 10 | < 10 |
| 3 | Non-CA | Negative | Negative | 40 | < 10 | < 10 | 10 | 10 |
| 4 | CA | Negative | Positive | < 10 | ND | ND | ND | ND |
| 5 | Non-CA | Negative | Positive | < 10 | ND | ND | ND | ND |
CA = Congenital anomalies; DENV = dengue virus; ND = not determined; PRNT = Plaque reduction neutralization test; ZIKV = Zika virus.
* Value indicates PRNT endpoint at which the highest serum dilution inhibited formation of plaque-forming units by ≥ 90%.