FRIDAY, Sept. 2, 2022 (HealthDay News) — A total of 97 people across six states have now been made ill by Escherichia coli in an outbreak possibly tied to contaminated lettuce used in sandwiches sold at Wendy’s restaurants.

“Since the last update on August 25, 2022, 13 more illnesses have been reported to CDC,” the U.S. Centers for Disease Control and Prevention said in an updated statement released Thursday. Two states — Kentucky and New York (with one case each) — have now been added to the list of states reporting cases, which also includes Michigan (58 cases), Ohio (24), Indiana (11), and Pennsylvania (two).

Illnesses from infection with the gastrointestinal bacterium have often been severe. “Of 81 people with information available, 43 have been hospitalized and 10 developed hemolytic uremic syndrome, a serious condition that can cause kidney failure,” the CDC said, although “no deaths have been reported.”

The exact source of the outbreak has still not been officially confirmed, but the CDC said that in 67 cases where investigators asked what people had eaten in the week prior to becoming ill, 81 percent reported that they had eaten at Wendy’s. “Of 54 people with detailed information about what they ate at Wendy’s, 37 [69 percent] reported eating romaine lettuce served on burgers and sandwiches,” the agency noted.

On Aug. 19, Wendy’s announced that it had removed romaine lettuce from its sandwiches in Michigan, Ohio, and Pennsylvania. “Wendy’s is taking the precautionary measure of removing the romaine lettuce being used in sandwiches from restaurants in that region,” the CDC said at the time. “Investigators are working to confirm whether romaine lettuce is the source of this outbreak, and whether romaine lettuce used in Wendy’s sandwiches was served or sold at other businesses.”

Romaine lettuce sold in grocery stores does not appear to be affected, the CDC said, and people can still eat at Wendy’s and eat the romaine lettuce in the salads it sells. Wendy’s explained in a statement that the lettuce used in its salads is not the same as that used in its sandwiches.

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