The Food and Drug Administration says a salmonella outbreak that began last summer has recently been traced to peanut butter made at a ConAgra plant in Sylvester, Georgia.

The peanut butter recalled was sold under the Peter Pan and Great Value brands.

The recall does not affect Great Value peanut butter made by other manufacturers, the FDA said.

Product codes beginning with the number 2111 are on the product lids.

ConAgra said in the aftermath of a salmonella outbreak, that consumers should throw away all Peter Pan and Great Value peanut butter jars produced by ConAgra that have that product code.

Lids of jars with a product code beginning with "2111" can be returned to ConAgra for a refund, the company said.

To get a refund, consumers should send lids and their names and addresses to ConAgra Foods, P.O. Box 57078, Irvine, CA 92619-7078 This is the first salmonella outbreak linked to peanut butter in US history.

West Virginia's border states - Pennsylvania, Virginia, Kentucky, Maryland and Ohio - have also reported cases.

Federal health officials say about 20 percent of those infected had to be hospitalized, but all survived.

Symptoms of salmonella can include diarrhea, fever, dehydration, abdominal pain and vomiting.

For more information about a refund - call 866-344-6970.