Listeria can survive and grow in refrigerated food. It can be killed by heating foods to “steaming hot,” or 165 degrees Fahrenheit, the CDC says. But that’s not always possible — or palatable — for foods that are made to be eaten cold.

SPAR discovered Listeria monocytogenes in three of its chicken products, prompting an urgent food recall from the supermarket and an alert from the Food Standards Agency (FSA). At such a critical moment in US history, we need reporters on the ground. Your donation allows us to keep sending journalists to speak to both sides of the story.

To alert customers, Spar is displaying point of sale notices in stores that sell the impacted products which explain why the recall was announced. “Spar Enjoy Local Fillets have tested positive for Listeria monocytogenes,” the retailer said.

U.S. health officials say a listeria outbreak linked to ready-to-eat sandwiches and snacks has sickened at least 10 people.

Listeria monocytogenes can be especially dangerous for pregnant women, newborns, older adults and those with weak immune systems.