Photo by Kaitlyn A. Rossi.

It’s not just Chipotle—now the Smithsonian’s National Zoo is dealing with an E. coli discovery that has led to the temporary closure of the Kids Farm.

Zoo veterinarians first found E. coli in goats during a routine fecal screening process on February 18. At that point, the Zoo moved the goats inside and did not permit visitors to see them. When the latest results came back on February 26, four goats and one cow tested positive.

Zoo staff then quarantined the farm animals, which are now all being treated with antibiotics. All of the animals with public contact had negative test results when they were previously tested in December 2015.

“The good news is that none of our animals have shown symptoms and neither has the staff,” says Pamela Baker-Masson, a spokesperson for the Zoo. “E. coli is everywhere. It’s in the environment all around us, but we wanted to do our due diligence.” W

In a release, the Zoo says that the E. coli “could have been transferred to the goats and cow from a wild animal, from humans or through a food source.”

The Zoo plans to lift the quarantine and reopen the Kids Farm after three consecutive weeks of negative test results.