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A Wisconsin bride landed in the hospital on her honeymoon with cyclosporiasis, a parasitic illness suspected of spreading through contaminated lettuce. A few days into a camping trip to Yellowstone, Gretchen Pleuss started feeling sick. “It was just like incessant diarrhea,” she told Milwaukee television station WISN . The pain grew bad enough that she went to an emergency room, where doctors confirmed the parasite. “It feels like your intestines are really tight, like something is seizing them,” she said. She believes shredded lettuce in a sandwich was the cause. Cyclosporiasis is...