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  • Title: Significant elevation of B cells at the acute stage in enterovirus 71-infected children with central nervous system involvement.
    Author: Xie J, Jiao Y, Qiu Z, Li Q, Li T.
    Journal: Scand J Infect Dis; 2010 Dec; 42(11-12):931-5. PubMed ID: 20950217.
    Abstract:
    A feature of the large outbreak of human enterovirus 71 (EV71)-associated hand-foot-and-mouth (HFMD) disease in China in 2008 was that severe cases presented with encephalitis. This study was performed to evaluate the immunophenotypic characteristics of patients with neurological involvement. Twenty-one patients with encephalitis and 14 with uncomplicated HFMD were recruited. Age-matched healthy volunteers were enrolled as controls. Peripheral lymphocyte subsets were analyzed by use of 3-colour flow cytometry, and the quantitative determination of plasma immunoglobulin (Ig) levels was also monitored. Comparisons between severe and mild cases demonstrated significant elevations of B cells and IgG levels and corresponding general decreases in natural killer (NK) cells and T lymphocytes in severe cases at the acute stage of infection (p < 0.01 for all). During the convalescent phase, rapid recoveries of B cells and IgG to the normal levels were observed, which appeared to be accompanied by an increase in EV71-specific neutralizing antibody titres. In summary, our data demonstrate that elevated B cells and IgG might be associated with neurological manifestations in EV71 infection.
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