SOLON, OHIO — Nestle USA’s Baking Division late Monday afternoon said it was informed by the Food and Drug Administration that a sample of its 16-oz Nestle Toll House refrigerated chocolate chip cookie dough bar tested positive for E. coli O157:H7. The contaminated sample was collected at Nestle’s facility in Danville, Va., on June 25.

The F.D.A. cautioned that further testing is needed to conclusively link the E. coli strain found in the product to the same strain that has sickened 69 people in 29 states. Nestle’s product previously had been linked to an F.D.A. investigation that began June 17.

"Nestle continues to work closely and in full cooperation with the F.D.A. on the ongoing investigation," Nestle said. "We are very concerned about those who have become ill from E. coli O157:H7, and deeply regret that this has occurred."

Nestle reiterated that the recall does not include other Nestle Toll House products, including already baked Toll House cookies purchased outside the home, all varieties of Nestle Toll House morsels, chocolate baking bars, or cocoa, and Dreyer’s and Edy’s ice cream products with Nestle Toll House cookie dough ingredients. The recall also does not include any Nestle Professional cookie dough products designed for food service use, including frozen Nestle Toll House cookie dough and cookie dough "mix-ins" purchased outside the home.