A listeria outbreak from 2014 that caused one death has been linked to raw milk produced at a Pennsylvania farm.

The Centers for Disease Control and Prevention was able to trace back the strain of listeria found in raw chocolate milk at Miller's Organic Farm in November 2015 to the 2014 outbreak, which caused two reported illnesses and one death.

Miller's Organic Farm is a private club that allows members to purchase products directly from the farm, including raw milk.

In its report, the CDC expressed concern that with listeria found at the farm as recently as November 2015, current consumers of the farm’s raw milk and other dairy products could be in danger of listeria exposure.

The listeria bacteria can cause diarrhea, fever and flu-like symptoms and can be deadly in the most severe cases. Those at highest risk of severe illness are children under 5, adults over 65, pregnant women and those with compromised immune systems, according to the CDC.

The CDC recommends that people only consume pasteurized dairy products.

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