Holly, a 19-year-old chimpanzee at the St. Louis Zoo, was euthanized Wednesday because of advanced liver cancer, the zoo said Thursday.
Tests performed Tuesday had suggested the presence of tumors affecting the function of her liver, gallbladder and pancreas, the zoo said in a statement. On Wednesday, veterinarians attempted surgery and found the tumors to be inoperable.
Staff members agreed euthanasia while Holly was under anesthesia for surgery was the most humane course of action, the statement said.
A necropsy by the zoo’s pathology team will help veterinarians to better understand disease processes in chimps.
Holly was born March 30, 1998, at the Montgomery Zoo in Alabama and was transferred here as an infant. She did not have any offspring.
The St. Louis Zoo's Jungle of the Apes and Fragile Forest is home to eight chimpanzees.
Chimpanzees are critically endangered in their native Africa. Through its WildCare Institute, the zoo works to help conserve chimpanzees in their natural habitats.
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