American health officials note rising cyclospora infections. People consumed unsafe iceberg lettuce. The parasite clings on the greens even after washing. Symptoms include watery diarrhoea, stomach cramps and exhaustion. Some cases last weeks. New cases are appearing in several states. The CDC and FDA say toss any questionable lettuce now. Stay away from raw salads with iceberg lettuce for now. Restaurants must pull it from menus without delay.