Disgraced egg industry titan Austin "Jack" DeCoster and his son Peter DeCoster were charged with introducing adulterated food into interstate commerce, a misdemeanour.
A charging document filed in federal court in Iowa alleges the pair and their company sold shell eggs tainted with the strain of salmonella blamed in the months-long outbreak of 2010.
Their company, Quality Egg LLC, which includes the DeCosters' network of chicken and egg-laying farms in rural northern Iowa, is charged with introducing misbranded food into interstate commerce, a felony.
The company is also charged with bribing a public official, a felony, for an alleged 2010 payment meant to influence a US Department of Agriculture inspector to approve shell eggs that had been held back for failing to meet federal standards.
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Attorneys representing the DeCosters and the company didn't immediately return messages. The charges were filed in a document known as an information, which means they waived their right to be indicted and are expected to plead guilty as part of a plea agreement.
The Food and Drug Administration Quality blamed Egg, which marketed itself as Wright County Egg, for selling the tainted products that led to the outbreak.
Another Iowa egg company with ties to DeCoster's operations, Hillandale Farms, was also implicated. The companies recalled 550 million eggs in 2010 after public health officials found a sharp spike in reports of salmonella, which causes fever, cramps and diarrhea and can require hospitalisation.