Alfalfa sprouts appeared to be the cause of an outbreak of Salmonella Stanley (51 cases) in Sweden. The sprouts had been obtained from a variety of stores and restaurants and had been distributed to these locations from a large-scale sprout producer in southern Sweden. Salmonella Stanley was not isolated from any of the sprouts that were tested. Salmonella Mbandaka was found in a sample of alfalfa seed from the large-scale sprout producer. Up until July, 2007, there had been four Salmonella Mbandaka cases reported in Sweden that were the same genetic pattern as found in the seed. Two of the ill had reported eating sprouts.