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Nursing homes should ensure they are not serving potentially hazardous Uncle Ben’s brand rice products, the Food and Drug Administration has announced.

The federal agency issued an alert after Mars Foodservices, the parent company of Uncle Ben’s, recalled all bags and all lot numbers of Uncle Ben’s Infused Rice products made in 2013.

The products in question are not sold to individual consumers, but are distributed to nursing homes, hospitals, schools and other institutions, according to the recall notice.

One of the recalled products, Uncle Ben’s Infused Mexican Rice Flavor, was linked to illnesses at three public schools in Texas last week, the FDA noted. Students and teachers experienced itchy rashes, headaches and nausea for 30 to 90 minutes.

The FDA says an investigation is ongoing.

Click here to access the complete notice, issued Feb. 10.