WASHINGTON, D.C. (AP) -- The Iowa egg farm at the center of a massive salmonella outbreak received hundreds of positive results for salmonella in the two years before its eggs sickened more than 1,500 people, congressional investigators said Sept. 14.

In a letter to the company's owner, the House Energy and Commerce Committee said its investigators had obtained records showing Wright County Egg received 426 positive results for salmonella between 2008 and 2010. The company recalled 380 million eggs in August after its products were linked to hundreds of illnesses.

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