American health officials report more cyclospora infections. People ingested contaminated iceberg lettuce. The parasite stays on the greens regardless of washing. Symptoms cover watery diarrhoea, stomach cramps and exhaustion. Some cases last weeks. New cases are appearing in several states. The CDC and FDA say throw away any risky lettuce now. Avoid raw salads with iceberg lettuce for now. Restaurants must pull it from menus without delay.