The U.S. Centers for Disease Control and Prevention on Tuesday said the case count had risen from 89 cases in 15 states in the past week, with California joining the list.
More than half the cases have been in Illinois. There have been no deaths.
The U.S. Food and Drug Administration advised the public not to eat alfalfa sprouts produced by the Tiny Greens Organic Farm in Urbana, Ill., because of possible salmonella contamination. The warning issued Monday evening also includes a mix called spicy sprouts, which contains radish and clover sprouts.