Listeria has been found once again at the production facility of Jeni’s Splendid Ice Creams.

In a message on Friday from CEO John Lowe, he says listeria was found through routine swabbing.

In response, Lowe says all scoop shops will be temporarily closed and ice cream production will be halted until the matter is resolved.  Lowe claims ice cream served in scoop shops since the re-opening of stores in May is “100% listeria-free.”

This comes after Jeni’s shut down all scoop shops and recalled its entire product line in April after listeria was found in a pint-filling machine at a production kitchen.  A government investigation into Jeni’s revealed there was inadequate testing and cleaning in its Columbus plant before listeria was found in some of its ice cream pints.

The Food and Drug Administration released the results of its investigation into Jeni’s plant in late May after a Freedom of Information request from The Associated Press. The report says Jeni’s managers did not have an adequate sampling and testing program and were not sufficiently sanitizing some surfaces, including the floors. The report also details residue being found on some equipment.

The report said Jeni’s regulatory manager and director of operations, employees responsible for assuring compliance with government food safety guidelines, showed a “lack of competency” by failing to comply with some of those guidelines.