CercopithecusCercopithecus aethiopsErythrocebus patasMonkey DiseasesHaplorhiniCercopithecinaeGenes, vpuCameroonPhylogenySimian immunodeficiency virusSpecies SpecificitySimian T-lymphotropic virus 3CercocebusYaba monkey tumor virusDeltaretrovirus InfectionsSimian T-lymphotropic virus 1PrimatesSimian Acquired Immunodeficiency Syndrome