Exterior of a Costco storeMauri Gorgonzola cheese sold in Costco stores in Colorado is being recalled because a sample showed it was contaminated with E. coli, according to the U.S. Food and Drug Administration.

The FDA said the E. coli strain differs from the one that sickened 25 people in a five-state outbreak. It was during the probe into that outbreak that Colorado officials discovered the contaminated Gorgonzola. Authorities are still investigating how it became contaminated and if any consumers fell ill.

Costco is using member card records to contact consumers who bought the Gorgonzola.

The recalled cheese has sell-by dates of 01/13/11 and 01/14/11. Consumers should not eat it and return it to the store for a refund. Its distributor, DPI Specialty Foods of Tualatin, Ore., cut and packaged the Italian-made cheese for Costco stores in Colorado. Consumers with questions can call DPI at (800) 597-3876.

Most people infected with E coli suffer diarrhea and stomach cramps, but more serious cases can cause a severe infection and possibly kidney failure.

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