Abstract
Infectious Epstein-Barr virus (EBV) is shed from the oropharynx of infected hosts intermittently throughout life, but in the peripheral circulation the viral genome characteristically maintains itself in a noninfectious, cell-associated form. Sera from 125 persons with heterophil-positive acute infectious mononucleosis or EBV-associated nasopharyngeal carcinoma or who were healthy virus carriers were examined for evidence of cell-free viral DNA. EBV DNA suggesting viremia was detected in 11 (27%) of 41 infectious mononucleosis patients by polymerase chain reaction analysis but infrequently in healthy seropositive carriers and patients with nasopharyngeal carcinoma. In serial samples examined from 2 patients, serum EBV DNA was detected over a 3-day interval. Viral DNA was found in concert with one serologic marker of acute infection, EBV-specific polymeric IgA, that could affect patterns of viral spread and clinical symptomatology.
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