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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