If you've bought California nectarines, peaches, plums or pluots lately, even the organic kind, check the label carefully.

The Wawona Packing Co. in Cutler, California, announced late last week it's expanding a voluntary recall of its products.

The fruit may be contaminated with Listeria monocytogenes, a bacterium that can cause listeriosis. This serious infection can give you temporary problems such as a high fever, abdominal pain and diarrhea, headaches, stiffness and nausea.

The initial recall covered specific lots of fruit packed from June 1 through July 12. The company expanded the recall "as a precautionary step" by five days, to fruit packaged through July 17, in large part because it has "yet to identify with scientific certainty the source" of the Listeria monocytogenes at the packaging facility.

It's a national voluntary recall because "we do not know the locations of the companies or stores that received the products from our direct customers," according to a company statement. The company's testing initiated the recall; scientists found the bacterium on a peach and on two nectarines.

Read - Company expands voluntary fruit recall

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