Western lowland gorilla, Winston, at the San Diego Zoo Safari Park, February 11th. Tammy Spratt / San Diego Zoo Global

Eight gorillas at the San Diego Zoo have fully recovered after contracting Covid-19 last month, the zoo said.

The gorillas in the western lowlands have caught the west coast variant of the coronavirus, zoo officials say, despite team members taking all recommended biosecurity precautions.

All eight gorillas in the zoo were withdrawn after the diagnosis. Some showed symptoms such as “a slight cough, constipation, nasal discharge and intermittent lethargy,” said the zoo in an online update.

Zoo officials attribute the gorillas’ recovery to the “highest standard of care” offered by the zoo’s veterinary team, wildlife care professionals, and collaboration with a variety of colleagues and partners.

“We are so grateful for the growing concern and support we have received while the troops have safely recovered,” said Lisa Peterson, executive director of the San Diego Zoo Safari Park. “We are very excited to share the joy this beloved troop brings to our community and our guests.”

The San Diego Zoo has committed to sharing documentation of the coronavirus in its gorillas in the hopes that it will provide “vital information about the scientific understanding of the virus and its effects on great apes”.

The gorillas can now be seen by visitors.