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. 2015 Mar 20;30(2):146–152. doi: 10.1007/s12250-014-3555-2

EV71 infection correlates with viral IgG preexisting at pharyngo-laryngeal mucosa in children

Jingchang Xue 2, Yaoming Li 1,✉, Xiaoyi Xu 2, Jie Yu 1, Hu Yan 1, Huimin Yan 1
PMCID: PMC8200873  PMID: 25813631

Abstract

Enterovirus 71 (EV71) infection causes severe central nervous system damage, particularly for children under the age of 5 years old, which remains a major public health burden worldwide. Clinical data released that children may be repeatedly infected by different members in enterovirus and get even worsen. Mucosa, especially epithelium of alimentary canal, was considered the primary site of EV71 infection. It has been elusive whether the preexsiting viral antibody in mucosa plays a role in EV71 infection. To answer this question, we respectively measured viral antibody response and EV71 RNA copy number of one hundred throat swab specimens from clinically confirmed EV71-infected children. The results released that low-level of mucosal IgG antibody against EV71 broadly existed in young population. More importantly, it further elucidated that the children with mucosal preexsiting EV71 IgG were prone to be infected, which suggested a former viral IgG mediated enhancement of viral infection in vivo.

Keywords: EV71, clinical infection, mucosal IgG, VP1, VP2, 3D

Footnotes

ORCID: 0000-0002-7579-2669

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Articles from Virologica Sinica are provided here courtesy of Wuhan Institute of Virology, Chinese Academy of Sciences

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