A salmonella outbreak that has slowly grown to nearly 300 cases in 39 states since August has been linked to tainted peanut butter, federal health officials said.
It is believed to be the first salmonella outbreak associated with peanut butter in U.S. history, officials with the Centers for Disease Control and Prevention said Wednesday.
About 20 percent of the 288 infected people have been hospitalized, but none has died, said Dr. Mike Lynch, a CDC epidemiologist.
About 85 percent of the infected people said they ate peanut butter, CDC officials said.
How salmonella got into peanut butter is still under investigation, Lynch said.
The Food and Drug Administration warned consumers not to eat certain jars of Peter Pan or Great Value peanut butter because of the risk of contamination.
ConAgra said it is recalling all Peter Pan and Great Value peanut butter with the product code given by the government.
"Although none of our extensive product tests have indicated the presence of salmonella, we are taking this precautionary measure because consumer health and safety is out top priority," spokesman Chris Kircher said. "We are working closely with the FDA to better understand its concerns, and we will take whatever additional measures are needed to ensure the safety, quality and wholesomeness of our products."
Salmonella infection is known each year to sicken about 40,000 people in the United States, according to the CDC. Salmonellosis, as the infection is known, kills about 600 people annually.
Symptoms of salmonella can include diarrhea, fever, dehydration, abdominal pain and vomiting, reports AP.
The new outbreak began in August, but just two or fewer cases have been reported each day, CDC officials said.
It was only in the past few days that investigators were able to hone in on a particular food, Lynch said.
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