January 25, 2021


Jan. 25, 2021

San Diego Zoo Global

Public Relations



San Diego Zoo Safari Park Gorillas Recovering After SARS-CoV-2 Diagnosis: Apes’ Health Owed to Collaboration with Colleagues and Partner Organizations; Diagnosis Could Deepen Scientific Understanding of World Pandemic

          The gorilla troop at the San Diego Zoo Safari Park is recovering following the diagnosis of SARS-CoV-2, the virus that causes COVID-19 in humans, in several troop members earlier this month. San Diego Zoo Global is relieved to announce that the eight-member troop is eating, drinking, interacting and on their way to a full recovery, thanks to the incredible work of wildlife care professionals, the veterinary team, and collaborations with a wide array of colleagues and partners who ensured that the highest standard of care was given to the affected gorillas.

          The conservation organization joined forces with many local, state and national leaders in the medical, scientific, zoological and public health communities. In addition to providing the best care possible for the gorilla troop, this ongoing teamwork could contribute to a deeper understanding of the impacts of this virus on animals and people worldwide.

          These colleagues include professionals from San Diego County Public Health, UC San Diego Health, Rady Children's Hospital-San Diego, the Scripps Research Institute, California Animal Health and Food Safety Laboratory System, California Department of Food and Agriculture, California Department of Public Health, California Department of Fish and Wildlife, U.S. Department of Agriculture National Veterinary Services Laboratories, USDA Animal and Plant Health Inspection Service, Centers for Disease Control and Prevention, Food and Drug Administration Center for Veterinary Medicine, The Great Ape Heart Project based at Zoo Atlanta and Chicago Zoological Society Radiology Consulting Service.

          Despite team members going above and beyond all recommended biosecurity precautions, several members of the Safari Park gorilla troop tested positive for the virus on Jan. 11. The troop was infected with a new, highly contagious strain of the coronavirus, recently identified in California. The troop has remained under close observation since the diagnosis, when some gorillas showed symptoms including mild coughing, congestion, nasal discharge and intermittent lethargy.

          Due to advanced age, symptoms including cough and lethargy, and a concern for underlying medical conditions, the silverback, Winston, underwent a diagnostic examination under anesthesia. Veterinarians confirmed pneumonia and heart disease. Following consultation with specialists, treatment was initiated, including heart medications, antibiotics and monoclonal antibody therapy. The monoclonal antibody therapy originated from a supply that was not permitted for human use. Treatment with these synthetic versions of the body’s natural defenses is thought to be effective in diminishing effects from the virus. The veterinary team who treated Winston believe the antibodies may have contributed to his ability to overcome the virus.

          The network of collaborators has also provided San Diego Zoo Global veterinarians with a limited supply of a recombinant purified spike protein vaccine, intended for use in protecting animals against SARS-CoV-2. The vaccine doses originated from a supply strictly intended for nonhuman use. San Diego Zoo Global teams have already begun identifying animal candidates for vaccination at the San Diego Zoo and San Diego Zoo Safari Park.

          Veterinarians regularly vaccinate wildlife, both in human care and native habitats, against a range of diseases.

          While the sharing of information and what was learned from this experience has already begun among wildlife care professionals at over 200 zoos worldwide, San Diego Zoo Global is committed to providing resources from occurrences at its parks in San Diego with conservation organizations globally, for the further protection of the species. San Diego Zoo Global recognizes that the documentation of the SARS-CoV-2 virus in gorillas at the San Diego Zoo Safari Park may provide important information regarding scientific understanding of the virus and its effects on great apes. The organization will continue to share what it has learned about curbing zoonotic disease transmission, biosecurity protocols in managed care and field settings, and the implications to ensuring optimal health outcomes for humans and wildlife globally.

About San Diego Zoo Global
           As a leader in conservation, the work of San Diego Zoo Global includes on-site wildlife conservation efforts (representing both plants and animals) at the San Diego Zoo, San Diego Zoo Safari Park, and San Diego Zoo Institute for Conservation Research, as well as international field programs on six continents. The work of these entities is made accessible to over 1 billion people annually, reaching 150 countries via social media, our websites and the San Diego Zoo Kids network, in children’s hospitals in 12 countries. The work of San Diego Zoo Global is made possible with support from our incredible donors committed to saving species from the brink of extinction.



Link includes:

  • Photos of gorilla troop at San Diego Zoo Safari Park
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