Recombinant RhCMV was created to study super-infection of Rhesus macaques. These viruses (RhCMV Δ178;RhCMV Δ182-189;RhCMV Δ178Δ182-189) were co-hybridized with a wild-type BAC-derived RhCMV to a RhCMV tiling array to ensure that there were no additional mutations beyond the intended deleted regions. Overall design: Comparison of wild-type BAC-derived RhCMV Δ178, RhCMV Δ182-189, and RhCMV Δ178Δ182-189