CercopithecusCercopithecus aethiopsGenes, vpuMonkey DiseasesErythrocebus patasCameroonSimian immunodeficiency virusCercopithecinaeHaplorhiniSimian T-lymphotropic virus 3CercocebusEcosystemYaba monkey tumor virusPhylogenyDeltaretrovirus InfectionsSimian T-lymphotropic virus 1Animals, WildSimian Acquired Immunodeficiency SyndromeSpecies SpecificityPan troglodytesGenes, envMolecular Sequence Data