Seven additional big cats at New York's Bronx Zoo have tested positive for Covid-19, according to the Wildlife Conservation Society, the non-profit organization that runs the zoo.
That makes a total of eight big cats who contracted coronavirus at the famed zoo in New York City.
Some context: Three tigers and three African lions exhibited symptoms in early April when the zoo announced a 4-year-old Malayan tiger, named Nadia, tested positive for the virus. Testing on these six cats now confirm they have Covid-19. One more tiger also tested positive despite showing no symptoms.
The zoo says all eight animals are behaving normally and eating well.
The cats were infected by a staff member, although it is unclear how the infection occurred.
Preventive measure are now in place for all staff who are caring for cats in the four zoos run by the Wildlife Conservation Society in New York. They include the Bronx Zoo, the Central Park Zoo in Manhattan, the Prospect Park Zoo in Brooklyn and the Queens Zoo.
The zoos have been closed since March 16.