Thirteen cases of Salmonella Typhimirium infection in Oregon and Washington last month (in which at least two people required hospitalization) have been tied to alfalfa sprouts. In response, Sprouters Northwest Inc. has recalled alfalfa sprouts sold in a variety of packages labeled "Alfalfa Sprouts," or as mixed varieties that contain alfalfa sprouts as an ingredient, to grocery stores and possibly other retail outlets in Washington and Oregon. People who bought the label should discard it or return it to the store.