The zoo closed to the public on March 16 and since then about 300 workers of its 700-plus staff were deemed “essential” to care for animals and maintain the zoo’s operations.
They are split in half into two teams, which report on alternating weeks, maintaining social distancing to protect the animals, while providing hay to American bison or offering fish to hungry Magellanic penguins.
“The animals are blissfully unaware of what the rest of us have been going through,” said Mr. Breheny, whose first job at age 14 was staffing the zoo’s camel rides.
The tiger was the only animal tested because the procedure involved general anesthesia, the Agriculture Department said. While there were other tigers and lions showing similar symptoms, the veterinarian wanted to limit the potential risks of general anesthesia to one animal, it said.
“At this time, there is no evidence to suggest that any animals, including pets or livestock, can spread Covid-19 infection to people,” it said.
There have been no known reports of pets becoming sick with Covid-19 in the United States, but the department recommended that people who have the virus limit contact with animals until there was more information about how it is transmitted.
“If you are sick with Covid-19, avoid contact with your pet, including petting, snuggling, being kissed or licked, and sharing food,” the department said.
Christine Hauser contributed reporting.