Abstract
Epstein-Barr virus (EBV) infects both B lymphocytes and squamous epithelial cells in vitro, but the cell type(s) required to establish primary and persistent infection in vivo has not been definitively elucidated. The aim of this study was to investigate a group of individuals who lack mature B lymphocytes due to the rare heritable disorder X-linked agammaglobulinemia in order to determine the role of the B cell in the infection process. The results show that none of these individuals harbored EBV in their blood or throat washings. Furthermore, no EBV-specific memory cytotoxic T lymphocytes were found, suggesting that they had not undergone infection in the past. In contrast, 50% of individuals were found to carry human herpesvirus 6, showing that they are infectible by another lymphotropic herpesvirus. These results add weight to the theory that B lymphocytes, and not oropharyngeal epithelial cells, may be required for primary infection with EBV.
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