In 2017, a team of medical experts—including specialists in the treatment of both human and wildlife patients—gathered to assess an esteemed elder resident of the San Diego Zoo Safari Park.
His name is Winston, a critically endangered silverback gorilla.
Today, at 51, he is considered one of the world’s oldest male gorillas in managed care.
Lived at Safari Park since 1984
Winston, who has lived at the Safari Park since 1984, is admired by guests and team members alike.
As the troop leader within the Gorilla Forest habitat, he fathered nine offspring and adopted two unrelated male gorillas—behavior seldom seen in silverbacks.
Winston’s wildlife care team has worked extensively to build and maintain his trust, and to deliver excellent medical care throughout his lifetime, zoo officials said.
As he aged, Winston predictably began to show signs of decline, but in 2017, his unusual lethargy and reduced appetite prompted concern.
His team decided to perform a series of diagnostic tests to identify the cause.
“Winston has always been an amazingly strong primate, but older great
apes—particularly male gorillas—are susceptible to heart disease, a primary cause of mortality,” said Matt Kinney, DVM, DACZM, senior veterinarian at the San Diego Zoo Wildlife Alliance. “Given Winston’s symptoms that year, we opted for an echocardiogram. The checkup was very
limited, but it allowed us to address immediate clinical concerns and establish a baseline for Winston’s cardiac care.”
Heart function irregularities, COVID
Although the overall results were promising, they still showed heart function
irregularities.
The findings were shared with the Great Ape Heart Project, a cardiac health initiative for great apes in human care, and monitoring of Winston’s condition continued.
Fast forward to January 2021 and Winston’s heart health once again became a central
concern—and a prominent media story. Winston and his troop were diagnosed with SARS-CoV-2, making them the first known great apes in the world to contract COVID-19.
Given his age, cardiac history, and the nature of the virus, a comprehensive medical team—including cardiologists, anesthesiologists, veterinary specialists and San Diego Zoo Wildlife Alliance health and care professionals—was formed to evaluate the senior ape.
A series of extensive tests over the span of six months led to diagnoses of heart, dental and kidney diseases, and other conditions. The team implemented a comprehensive treatment plan, including cardiac medications, supplements and a heart monitor implant.
“The heart monitor is a remarkable innovation, offering invaluable data on Winston’s
cardiac health,” said Kinney. “Along with his overall clinical condition and weight, we can make frequent adjustments based on the information received from his cardiac monitor.”
Additional therapy
Winston also underwent monoclonal antibody therapy, a synthetic defense against COVID-19, which was crucial to his recovery.
Since then, the Safari Park’s wildlife health and care teams, alongside Centers for Disease Control staff, have been monitoring Winston and his troop for potential long-term effects of COVID-19 on gorillas.
Caring for Winston throughout the years have been an extraordinary honor for our
-Kristi Burtis, vice president of wildlife care at the Safari
wildlife health and care teams.”
Park.
“Caring for Winston throughout the years have been an extraordinary honor for our
wildlife health and care teams,” said Kristi Burtis, vice president of wildlife care at the Safari Park. “He is undeniably the beloved member of our conservation park. His thriving exemplifies our commitment to conservation and the deep passion of those who care for him.”
For more information about Winston, visit stories.sandiegozoo.org/2023/09/19/heart-to-
heart/
Learn about the Alliance’s efforts in the African Forest Conservation Hub, including gorilla
conservation, at sdzwa.org/conservation-hub/african-forest.
Story submitted by the San Diego Zoo Wildlife Alliance.
