Combining Immunoassays to Identify Zika Virus Infection in Dengue-Endemic Areas

被引:4
|
作者
Sittikul, Pichamon [1 ]
Sriburin, Pimolpachr [1 ]
Rattanamahaphoom, Jittraporn [1 ]
Limkittikul, Kriengsak [1 ]
Sirivichayakul, Chukiat [1 ]
Chatchen, Supawat [1 ]
机构
[1] Mahidol Univ, Fac Trop Med, Dept Trop Pediat, Bangkok 10400, Thailand
关键词
Zika virus; dengue virus; nonstructural protein 1; serological diagnosis; cross-reactivity; CROSS-REACTIVITY; DIAGNOSIS; OUTBREAK; HISTORY;
D O I
10.3390/tropicalmed7100254
中图分类号
R51 [传染病];
学科分类号
100401 ;
摘要
Zika virus (ZIKV) is a mosquito-borne flavivirus that has recently emerged as a global health threat. The rise in ZIKV infections has driven an increased incidence of neonates born with microcephaly or other neurological malformations. Therefore, screening for ZIKV infection can considerably impact pregnant women, especially during the first trimester. The majority of ZIKV infections are mild or asymptomatic, and clinical diagnosis is inaccurate. Moreover, given the high level of cross-reactivity among flaviviruses, serological approaches to distinguish ZIKV from dengue virus (DENV) infections are complicated. We used the combination of DENV and ZIKV nonstructural protein 1 (NS1) IgG enzyme-linked immunosorbent assay (ELISA) and ZIKV NS1 blockade-of-binding (BOB) ELISA to test the convalescent sera of non-flavivirus, primary DENV, secondary DENV, and ZIKV infections. Our findings indicate that primary testing using a ZIKV NS1 IgG ELISA, the test of choice for large-scale ZIKV serosurvey studies, provided relatively high sensitivity. Moreover, the confirmation of positive ELISA results using the ZIKV NS1 BOB ELISA increased average specificity to 94.59% across serum samples. The combined use of two simple ELISAs for ZIKV serosurveys and the monitoring of ZIKV infection during pregnancy can elucidate the epidemiology, pathogenesis, and complications of ZIKV in DENV-endemic areas.
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页数:8
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