Frozen meals served to students across the United States as part of federally-funded school breakfast and lunch programs may be contaminated with listeria and have been recalled, officials announced on Saturday. The recall applied to approximately 91,585 pounds of prepackaged breakfast burritos and wraps, manufactured by the California company M.C.I. Foods between Sept. 17 and Oct. 14, said the Food Safety and Inspection Service, a branch of the U.S. Department of Agriculture that focuses on public health regulations.