期刊
JOURNAL OF INFECTIOUS DISEASES
卷 193, 期 1, 页码 68-79出版社
UNIV CHICAGO PRESS
DOI: 10.1086/498531
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Background. Human herpesvirus 6 (HHV-6) is increasingly recognized as an opportunistic and potentially life-threatening pathogen in recipients of allogeneic stem cell transplants (SCTs). Methods. To clarify the incidence and clinical relevance of active HHV-6 infection, serial titers of plasma HHV-6 DNA were determined for 50 allogeneic SCT recipients, using real-time polymerase chain reaction. Results. HHV-6 DNA was detected in plasma from 24 patients (48%). HHV-6 DNA was most frequently apparent similar to 14-27 days after transplantation. An increased risk of a positive result for HHV-6 DNA was associated with transplantation from an allelic-mismatch donor (P = .02) and administration of steroids (P = .04). Steroid use was associated with high HHV-6 DNA loads (P = .02). High HHV-6 DNA loads were correlated with delayed platelet engraftment (P = .04). Among patients who had positive results for HHV-6 DNA, the HHV-6 DNA load Pp. 04 was higher in plasma from those who developed limbic encephalitis (n = 4) (P <.0001). Conclusions. Active HHV-6 infection is not rare in SCT recipients. SCT from allelic-mismatch donors is associated with increased risk of active HHV-6 infection. Steroid therapy is associated with not only increased incidence of infection but also accelerated viral replication. Development of limbic encephalitis is associated with high HHV-6 DNA load.
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