Since Costco suppliers are required to have the ability to trace all their product ingredients, they have now turned their attention to the pomegranate seeds from Turkey that were added to the berry blend, Wilson said. This is because the virus strain that affected two consumers is rare in the Americas but common in the Middle East.
Simon said that it's a common misconception that healthy and organic food products are somehow safer than other food items.
"Organic does not equal safe," he said. "We see this all the time."
In December, an E.coli outbreak was linked to organic spinach after 33 people in five states became sick, according to CDC.
Townsend Farms did not immediately return calls from ABCNews.com seeking comment.