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Zika virus (ZIKV) recently emerged as a global threat subsequent to its global spread because it induces microencephaly and other brain damages in infants born to infected mothers. Epidemiological monitoring of infection has been hampered by the absence of reliable serological tests capable to distinguish between ZIKV and other Flavivirus infections, in particular Dengue virus (DENV). As both viruses are transmitted by the same mosquito-species, their distributions largely overlap and reliable serological distinction between the viruses is essential. Here we develop a novel biosensor which is based on recombinant forms of ZIKV non-structural protein 1 (NS1) and the domain III of the envelope protein (EDIII). Using electrochemical impedance spectroscopy (EIS) and square wave voltammetry (SWV), we demonstrate that in addition to extremely sensitive detection of ZIKV-specific antibodies in serum and saliva, the biosensor promptly distinguished ZIKV and DENV-specific antibodies. Hence, this novel biosensor allows assessing ZIKV antibodies in blood and saliva and results are unaffected by presence of DENV virus-specific antibodies.

Original publication

DOI

10.1016/j.bios.2018.04.058

Type

Journal article

Journal

Biosens Bioelectron

Publication Date

15/08/2018

Volume

113

Pages

101 - 107

Keywords

Antibody detection, Biosensor, Dengue, Zika-specific, Animals, Antibodies, Viral, Biosensing Techniques, Cross Reactions, Equipment Design, Humans, Mice, Inbred BALB C, Saliva, Viral Envelope Proteins, Viral Nonstructural Proteins, Zika Virus, Zika Virus Infection