Publisher’s Platform: Mystery Listeria Outbreak Investigation needs to be Reopened

On July 24, 2024, John tested positive for Listeria, while in the ICU. John’s sample was genetically linked, by Whole Genome Sequencing, to a cluster of Listeria associated with potatoes from Mexico.

Here are the prior investigations by States, FDA and CDC:

https://www.foodsafetynews.com/files/2025/08/2025-3195-CARA-656-_Redacted-4.pdf

https://www.foodsafetynews.com/files/2025/08/2025-3195-CARA-775-_Redacted-1.pdf

https://www.foodsafetynews.com/files/2025/08/2025-3195-CARA-918-_Redacted-1.pdf

Figure: SNP-tree of sequences of REP strain uploaded to the public sequence repository at 
NCBI as of July 2025

On July 16, 2024, John was admitted to the hospital with a headache, facial drooping, … Read the rest

New Listeria outbreak detected; other outbreaks remain under investigation

Inspectors with the Food and Drug Administration are tracking a new outbreak of infections from Listeria monocytogenes.

So far there are three confirmed patients. The FDA has not reported the ages of the patients or where they live. 

There are likely many more sick people than have been confirmed. The Centers for Disease Control and Prevention reports that for every patient confirmed in a Salmonella outbreak there are 29 patients who go undetected. This is because some patients do not … Read the rest