Nearly 300 people in 39 states have fallen ill since August 2006, linked to a Salmonella outbreak from peanut butter. It is believed to be the first Salmonella outbreak in U.S. history associated with peanut butter. Just two or fewer cases have been reported each day since August, Centers for Disease Control and Prevention (CDC) officials said, and it was only in the past few days that investigators were able to focus in on the particular food responsible. The highest number of Salmonella cases reported were in New York, Pennsylvania, Virginia, Tennessee and Missouri. According to the CDC, about 20% of the 288 infected people were hospitalized but no one has died.