The company said consumers could call 800-690-3200 for a refund or replacement coupons for tossed-out spinach products.

Wisconsin accounted for 29 illnesses, about one-third of the cases, including the lone death. The victim's son identified her Friday night as Marion Graff, 77, of Manitowoc, who died of kidney failure on Sept. 7.

Other states reporting cases were: California, Connecticut, Idaho, Indiana, Kentucky, Maine, Michigan, Minnesota, New Mexico, Nevada, New York, Ohio, Oregon, Pennsylvania, Utah, Virginia, Washington and Wyoming, according to the Centers for Disease Control and Prevention.

"We are telling everyone to get rid of fresh bagged spinach right now. Don't assume anything is over," Gov. Jim Doyle said.

FDA officials said they issued the nationwide consumer alert without waiting to identify the source of the tainted spinach.

"Early is good," said Caroline Smith DeWaal, food safety director for the Center for Science in the Public Interest, adding that the alert may have prevented hundreds of more cases.

An industry spokeswoman said public health concerns justified the blanket warning: "It needed to happen this way," said Kathy Means, a spokeswoman for the Produce Marketing Association. "Public health has to trump economics at this time."

More than half the nation's 500 million-pound spinach crop is grown in California's Monterey County, according to the Agriculture Department.

"We're trying to get to the bottom of this and figure out what happened. Everybody is terribly concerned," said Dave Kranz, a spokesman for the California Farm Bureau Federation.

Even before the latest outbreak, a joint state and federal effort has been under way in the California county to find and eliminate any possible sources of E. coli contamination.

"We need to strive to do even better so even one life is not lost," said Dr. Andrew von Eschenbach, FDA's acting commissioner.

The FDA's top food expert stressed the importance of stopping the bacterium at its source, since rinsing spinach won't eliminate the risk. "If you wash it, it is not going to get rid of it," said Robert Brackett, director of the agency's Center for Food Safety and Nutrition.

E. coli lives in the intestines of cattle and other animals and typically is spread through contamination by fecal material. Brackett said the use of manure as a fertilizer for produce typically consumed raw, such as spinach, is not in keeping with good agricultural practices. "It is something we don't want to see," he told a food policy conference.

Meanwhile, Wal-Mart Stores Inc., Safeway Inc., SuperValu Inc. and other major grocery chains stopped selling spinach, removing it from shelves and salad bars.