Mexico has banned imports of Foster Farms chicken from the three California plants connected to a recent Salmonella outbreak that caused more than 300 people in the U.S. to become ill. Mexican authorities contacted the U.S. Department of Agriculture on October 22 and asked them to delist the two Fresno facilities and another in Livingston.

Other Foster Farms plants in California, Oregon and Washington were not delisted.

USDA officials told news outlets this is the first time Mexico has delisted a facility based on a public health alert issued by the Food Safety and Inspection Service. Foster Farms did not recall any of the chicken, but several retailers, including Kroger and Costco, did.

It's not clear how much chicken Foster Farms exports to Mexico or how severely the ban will affect Foster Farms sales.