Figure. Left: cytopathic effect in Vero cells consisting of a plaque and rounding of the cells after homogenized altered mucosal membrane of the marmoset was added to the cell culture. Right: type-specific polymerase chain reaction (PCR). Lanes 1 and 2 show fragments of 229-bp DNA amplified from Human herpesvirus 1 (HHV-1) and 241 bp from HHV-2 control strains, respectively. Lane S shows an HHV-1–specific PCR product amplified from an oral mucosa specimen of the marmoset; no product was obtained from supernatants of uninfected cell culture (lane -). Lane M, 1 kb DNA Ladder (GIBCO/BRL,Grand Island, NY).