"This recall is being conducted in cooperation with the U.S. Food and Drug Administration (“FDA”) following notification of a recent consumer case in Florida which has been linked to a strain of Listeria monocytogenes found to be present at the Working Cow manufacturing facility during environmental sampling in 2017. Although subsequent environmental sampling has yet to yield positive test results, investigations are ongoing to ensure root cause has been properly addressed. No other illnesses have been reported."This is interesting in that the recall is being issued on the premise that the Listeria found in 2017 in the plant was still there in 2018 even though internal testing did not find it. One would guess that the epidemiological investigation found that the patient had eaten the ice cream in question.
https://www.fda.gov/Safety/Recalls/ucm622688.htm
Working Cow Homemade, Inc. Recalls Product Because of Possible Health Risk
For Immediate Release
October 4, 2018