Treatment with immunosuppression (IS) regimen alone failed to induced reactivation and dissemination of mouse cytomegalovirus (MCMV) after transplant of latently infected kidneys. BALB/c mice infected with Δm157 mcmv virus were treated with the same IS regimen (with IS [w/IS]) or PBS (without IS [wo/IS]) at 4 months after the infection. Selected organs were recovered at POD28. A, Schematic of experimental setup. B, DNA copy numbers in kidney, salivary gland (SG), lung, liver, and spleen determined by real-time PCR