title: Neutralizing antibody response in the patients with hand, foot and mouth disease to enterovirus 71 and its clinical implications.
abstract: Enterovirus 71 (EV71) has emerged as a significant pathogen causing large outbreaks in China for the past 3 years. Developing an EV71 vaccine is urgently needed to stop the spread of the disease; however, the adaptive immune response of humans to EV71 infection remains unclear. We examined the neutralizing antibody titers in HFMD patients and compared them to those of asymptomatic healthy children and young adults. We found that 80% of HFMD patients became positive for neutralizing antibodies against EV71 (GMT = 24.3) one day after the onset of illness. The antibody titers in the patients peaked two days (GMT = 79.5) after the illness appeared and were comparable to the level of adults (GMT = 45.2). Noticeably, the antibody response was not correlated with disease severity, suggesting that cellular immune response, besides neutralizing antibodies, could play critical role in controlling the outcome of EV71 infection in humans.
authors.affiliation: Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, 225 South Chongqing Road, Shanghai 200025, PR China.
authors.forename: Chunfu
authors.initials: C
authors.lastname: Yang
authors.forename: Chaoyang
authors.initials: C
authors.lastname: Deng
authors.forename: Junfeng
authors.initials: J
authors.lastname: Wan
authors.forename: Liye
authors.initials: L
authors.lastname: Zhu
authors.forename: Qibin
authors.initials: Q
authors.lastname: Leng
mesh_terms: D000328:Adult; D057134:Antibodies, Neutralizing / Q000097:blood* / Q000276:immunology; D000914:Antibodies, Viral / Q000097:blood* / Q000276:immunology; D002675:Child, Preschool; D002681:China; D029821:Enterovirus A, Human / Q000235:genetics / Q000276:immunology* / Q000302:isolation & purification; D005838:Genotype; D006232:Hand, Foot and Mouth Disease / Q000276:immunology* / Q000473:pathology; D006801:Humans; D007223:Infant; D008969:Molecular Sequence Data; D012367:RNA, Viral / Q000235:genetics; D017422:Sequence Analysis, DNA; D012720:Severity of Illness Index; D013997:Time Factors
chemical_list: D057134:Antibodies, Neutralizing; D000914:Antibodies, Viral; D012367:RNA, Viral