The salmonella strains connected to the outbreak have been identified in nearly 600 cases in 27 states and Puerto Rico

California-based poultry giant Foster Farms will recall some of the contaminated chicken linked to a massive salmonella outbreak that has stretched on for 16 months and sickened hundreds of consumers, the U.S. Department of Agriculture and Foster Farms announced late Thursday.

The chicken products being recalled were produced by Foster Farms at its three plants in central California, all of which public health investigators have connected to the outbreak that started in March of 2013. The outbreak has roiled the public and brought regulatory pressure on the poultry producer.