A specialty cheese manufacturer in Kenton, Delaware, has pleaded guilty to violating federal food and drugs laws that led to a 2014 outbreak of listeria infections from Hispanic-style cheese.

After a criminal and civil complaint was filed this week, Roos Foods Inc., has pleaded guilty to distribution of adulterated cheese in interstate commerce, a misdemeanor, U.S. Attorney Charles M. Oberly III said in a statement Friday.

The company and its principals, Ana A. Roos and Virginia Mejia, also have agreed to a permanent injunction, which requires them to stop processing and distributing food products unless they bring the operations into compliance with federal laws, he said.

The plea stems from a 2014 outbreak in which eight people – five adults and three newborns – in Maryland and California were infected with the L. mono bacterium that causes the disease listeriosis, according to the Centers for Disease Control and Prevention. One died as a result of the illness.

The U.S. Food and Drug Administration inspected the company’s Kenton facility and found unsanitary conditions, including roof leaks, rust flakes, un-cleanable surfaces, and product residue on equipment that had purportedly been cleaned, the complaint said. A sample collected at the facility found L. mono on 12 surfaces.