ConAgra Foods Inc. has extended its recall of all peanut butter produced at a plant in Georgia by more than a year, back to October 2004, the Food and Drug Administration said Friday.

The recall covers all Peter Pan peanut butter and all Great Value peanut butter beginning with product code 2111, including peanut butter toppings.

Peanut butter has a long shelf life, and the FDA's announcement reflects the ongoing investigation, said ConAgra spokeswoman Stephanie Childs. Any peanut butter matching the recall, regardless of the date, can be returned to the place of purchase, or customers can send the lid to ConAgra for a refund.

According to the Centers for Disease Control and Prevention, 425 people have fallen ill from the outbreak of salmonella that has been traced back to the plant in Sylvester, Ga.

The FDA warned consumers who have purchased any of the products since October 2004 to discard them, and not to eat any Peter Pan or Great Value peanut butter with a product code beginning with 2111.

ConAgra on Feb. 14 recalled all Peter Pan and Great Value peanut butter made at the Georgia plant after federal health officials linked the product to an outbreak that began in August. At that time the recall applied to all peanut butter made since December 2005.

To obtain a refund, consumers can return the product to the store where they bought it or mail in lids with their names and addresses to ConAgra Foods, P.O. Box 3768, Omaha, NE 68103.