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- W2976201224 abstract "Zika virus (ZIKV) is a mosquito-borne flavivirus that has caused recent large outbreaks in the Americas. Given its association with severe congenital defects including microcephaly, distinguishing infections caused by ZIKV from those caused by dengue virus (DENV) is of primordial importance. The objectives of this study were to evaluate the recombinant proteins rEIII-ZIKV (Envelope protein domain III) and rNS1ß-leader-ZIKV (non-structural protein 1) for the serological diagnosis of ZIKV in the Mexican population. We also evaluated potential cross-reactivity in commercial enzyme-linked immunosorbent assays (ELISA) based on the ZIKV NS1 and DENV NS1 proteins. rEIII-ZIKV and rNS1ß-leader-ZIKV proteins were tested with sera from 30 PCR-confirmed ZIKV cases, 50 ZIKV-naive, DENV-exposed subjects with no acute febrile disease, (asymptomatic subjects, AS), and 50 ZIKV-naive and DENV naive AS. Commercial ELISA tests were evaluated with sera from 57 ZIKV and 20 DENV PCR-confirmed cases, and 50 ZIKV-naive, DENV-exposed AS. In-house ELISA assays showed that IgM antibody levels against rEIII-ZIKV and rNS1ß-ZIKV were higher in ZIKV naive, DENV-exposed AS than in acutely infected ZIKV individuals. IgG reactivity was highest for rEIII-ZIKV, and indistinguishable between acutely infected ZIKV cases and DENV exposed AS. Positivity for the Euroimmun Zika IgM assay at 7–10 days was considerably higher in DENV-naive ZIKV patients (86%) than in DENV-exposed ZIKV patients (33%), while 39% of the latter had false-negative anti-ZIKV IgG before 7 days of onset. DENV-exposed ZIKV patients presented lower anti-ZIKV IgM and higher IgG responses similar to a secondary dengue response. Forty-four percent of DENV- exposed acute ZIKV patients were DENV IgM positive with the Panbio Dengue assay, and two (15%) of the DENV-naive ZIKV patients presented false DENV IgG conversion. Given the extensive cross-reactivity to both the NS1 and EDIII proteins in current serological methods, the development of sensitive and specific serological tests to distinguish ZIKV from DENV infections is an urgent priority." @default.
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- W2976201224 date "2020-01-01" @default.
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- W2976201224 title "Serological tests reveal significant cross-reactive human antibody responses to Zika and Dengue viruses in the Mexican population" @default.
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- W2976201224 doi "https://doi.org/10.1016/j.actatropica.2019.105201" @default.
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