Pig-tailed macaques maintained at the WaNPRC are acquired from different breeding colonies. The prevalence of MneHV-6 and MneHV-7 was determined in PBMC samples from macaques grouped by their breeding colony of origin. Prevalence is reported as percentage of samples with detectable viral loads in PBMCs for each location of origin. The numbers of samples per colony are indicated. (Medical Lake Primate Field Station: Medical Lake PFS, Tulane National Primate Research Center: Tulane NPRC, Yerkes National Primate Research Center: Yerkes NPRC, Washington National Research Station: WaNPRC , New Iberia Research Center: NIRC, Shin Nippon Biomedical Laboratories USA-Scientific Resource Center: SNBL USA SRC).