Pennsylvania consumers who have purchased raw milk from the dairy of Charles Bartels in Meshoppen, Wyoming County, any time after March 1, 2007 should discard it immediately due to the risk of Listeria monocytogenes contamination, Agriculture Secretary Dennis Wolff said.

"During routine inspection, a preliminary test showed the presence of Listeria bacteria in some of the raw milk samples taken from the Bartels farm," said Wolff in a prepared statement. "If consumers have raw milk from this dairy, they should discard it immediately."

There have been no illnesses reported because of the potential contamination, but if individuals who consumed the raw milk become ill, they are advised to consult their physician.

Keep reading here