Furthermore , the striking identity of XMRV genomic sequences and their similarity to xenotropic MLVs in several human cell lines suggested that XMRV is not a transmissible human pathogen .
Samples that were positive for XMRV were also positive for mouse DNA contaminants .
The striking identity of XMRV genomic sequences and their similarity to xenotropic MLVs in several human cell lines suggested that XMRV is not a transmissible human pathogen .
Samples that were positive for XMRV were also positive for mouse DNA contaminants .