Evaluation of a Leukocyte Stabilization Reagent for Use in the Cytomegalovirus pp65 Antigenemia Assay

New erythrocyte lysis and leukocyte stabilization reagents (Streck Laboratories, Inc.) were tested in the cytomegalovirus pp65 antigenemia assay, to determine if whole-blood processing time could be delayed to 24 h postdraw. The combination of these reagents gave results comparable to those for patient samples processed immediately after blood draw.