Xenotransplantation failure dissipated. An American infant girl known as "Baby Fae" with hypoplastic left heart syndrome was the first infant recipient of a xenotransplantation, when she received a baboon heart in 1983. The procedure was performed by Leonard L. Bailey at Loma Linda University Medical Center in Loma Linda, California. Fae died 21 days later due to a humoral-based graft rejection thought to be caused mainly by an ABO blood type mismatch, considered unavoidable due to the rarity of type O baboons. The graft was meant to be temporary, but unfortunately a suitable allograft replacement could not be found in time.
Olive baboon elephants use the tree-top baboons as an early warning system. The olive baboon is listed as least concern by the IUCN because "this species is very widespread and abundant and although persecuted as a crop raider there are no major threats believed to be resulting in a range-wide population decline". Despite persecution, the baboon is still widespread and numerous. Competition and disease have possibly led to fewer baboons in closed forests. It has been actively persecuted as a pest. Olive baboon The olive baboon ("Papio anubis"), also called the Anubis baboon, is a member of the family Cercopithecidae (Old World