The Centers for Disease Control and Prevention, Food and Drug Administration and local health authorities are investigating a multi-year outbreak of listeria monocytogenes infections linked to queso fresco and Cotija cheeses made by Rizo Lopez Foods Inc., of Modesto, CA.
The outbreak persisted as early as 2014, with new cases reported as recently as December 2023. The investigation, prompted by positive listeria findings in Rizo Bros Aged Cotija cheese, resulted in a voluntary recall in January 2024. Despite previous inconclusive evidence, whole genome sequencing now confirms the link between the recalled Cotija cheese and illnesses in this ongoing outbreak, urging heightened vigilance among consumers.
As a result of the ongoing investigation, Rizo Lopez Foods, Inc. has initiated a voluntary recall of all sell-by dates for its dairy products. These include cheese, yogurt and sour cream sold under brands such as Tio Francisco, Don Francisco, Rizo Bros and others. The company has halted production and distribution of these items temporarily while investigations continue.
