"The egg producer whose eggs were linked to a nationwide salmonella outbreak that sickened nearly 2,000 people was told that hens at its farms were contaminated four months before the salmonella outbreak led to the recall of 550 million eggs.
Documents unearthed in a lawsuit by California food cooperative NuCal Foods show that as of May 2010, Iowa State University's Veterinary Diagnostics Lab had told the Iowa egg companies owned by Jack DeCoster that salmonella had been found in dead chickens and manure at three DeCoster plants."