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Table 1 Plaque Reduction Neutralization Test (PRNT) for Zika virus (ZIKV) and dengue virus (DENV1–4) in maternal serum, child serum and cerebrospinal fluid (CSF) specimens collected at different ages of the neonate with Congenital Zika Syndrome

From: Persistent detection of Zika virus RNA from an infant with severe microcephaly – a case report

Sample Age at testing PRNT50 Titer
ZIKV DENV-1 DENV-2 DENV-3 DENV-4
Mother (serum) 17 monthsa 972 < 20 < 20 689.5 262.7
Neonate
 Serum 17 months 527.9 < 20 < 20 < 20 < 20
 CSF 6 months 99 < 20 < 20 < 20 < 20
  1. aAge of the child at the time of sample collection