Sasha M.
Google
The US Food and Drug Administration (FDA) and the US Centers for Disease Control and Prevention ( CDC) have identified queso fresco and cotija cheese manufactured by Rizo Lopez Foods (Modesto, CA) as the source of a deadly outbreak of Listeria monocytogenes illnesses that has gone unsolved for almost ten years.
Since June 2014, the outbreak has caused twenty-six illnesses, including two deaths. Twenty-three of the outbreak victims required hospitalization. Confirmed cases have been reported in eleven states.
The CDC investigated this outbreak twice before (in 2017 and 2021). Although epidemiological evidence pointed to queso fresco and other similar cheeses as the likely source at that time, health authorities were unable to trace the illnesses to a specific manufacturer.
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The breakthrough came in January 2024, when the Hawaii State Department of Health found Listeria monocytogenes in a sample of Rizo Bros Aged Cotija cheese.
In response to the finding, the company recalled the contaminated production batch, and the FDA initiated an inspection of the Modesto, California, manufacturing facility.