Beyranevand says it’s possible that a particular food product could become contaminated if it was raised or farmed somewhere with elevated levels of Cs-137. Either way, she believes the breaded frozen shrimp recall is “definitely a cause for concern” for the food industry-at-large.

The FDA detected Cesium-137, a radioactive isotope, in one shipment of Great Value frozen raw shrimp to Walmart. It said the affected shipment wasn’t sold.

Walmart is recalling certain frozen shrimp products sold under its Great Value brand after the U.S. Food and Drug Administration (FDA) warned that the seafood may be at risk for radioactive contamination.