A multistate outbreak of Salmonella Newport was attributed to the consumption of alfalfa sprouts. Genetic fingerprinting of the Salmonella Newport isolates from case-patients showed that they had a genetically identical strain of this bacteria. The outbreak began March 1. The initial investigation traced the implicated sprouts to a single processor, J.H. Caldwell and Sons, Inc., a firm located in California. The company is also known as Caldwell Fresh Foods. The company issued a recall of alfalfa sprouts on May 21. The sprouts were sold in many locations, including more than 400 Wal-Mart stores in 15 states, Trader Joe's, and in restaurants.