(SANFRANCISCO.CBSLOCAL) — The San Francisco Department of Public Health is warning residents about potential exposure to typhoid fever.

SFDPH reports that a restaurant worker a the Nordstrom Café at Stonestown Galleria has been diagnosed with the infectious disease.

An investigation is ongoing, but officials said the food handler likely contracted the disease overseas.

Anyone who ate at the Nordstrom Cafe within the Nordstrom store in the Stonestown Galleria in San Francisco on April 16, 17, 18, 20, or 27, 2013 may be at risk of exposure.

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