Salmonella Typhimurium Contamination of Riverside, Calif., Supply

IN an late epidemic May and of early gasteroenteritis June of 1965 afan pidemic of gasteroenteritis affected an estimated 18,000 people in and near the city of Riverside, Calif. A task force of local, state, and federal experts studying the outbreak concluded that the offending organism, Salmonella typhimurium, was transmitted through the city water system. Salmonella typhimurium is a natural pathogen of all warm-blooded animals and has even been isolated in reptiles. In humans it has been a common