FIG. 1.
Monitoring of individual patients for CMV load by the pp65 assay or ultrasensitive PCR. On the abscissa are represented the days after transplantation. On the left y axis are reported the number of pp65 antigen-positive cells per 2.5 × 105 leukocytes (blue circles with white centers). On the right axis are reported the number of CMV DNA copies expressed per milliliter of plasma (red triangles). The blue circles with blue centers represent pp65 assays that were not possible because of severe leukopenia. The horizontal bars represent the durations of the following antiviral therapies; ganciclovir (vertical hatching), foscarnet (horizontal hatching), cidofovir (oblique hatching), and valaciclovir or intravenous acyclovir (open).