The Food and Drug Administration (FDA) is conducting a very active and dynamic investigation into the source of the Salmonella Typhimurium outbreak.  At this time, the FDA, the Centers for Disease Control and Prevention (CDC), and state partners have traced sources of Salmonella Typhimurium contamination to a plant owned by Peanut Corporation of America (PCA), which manufactures peanut butter and peanut paste—a concentrated product consisting of ground, roasted peanuts—that are both distributed to food manufacturers to be used as an ingredient in many commercially produced products including cakes, cookies, crackers, candies, cereal and ice cream. In addition, PCA peanut butter is distributed to and institutionally served in such settings as long-term care facilities and cafeterias.

Source: FDA