American health officials announce rising cyclospora infections. People consumed contaminated iceberg lettuce. The parasite clings on the greens despite washing. Symptoms cover watery diarrhoea, stomach cramps and exhaustion. Some cases last weeks. New cases are emerging in multiple states. The CDC and FDA say throw away any risky lettuce now. Skip raw salads with iceberg lettuce for now. Restaurants must pull it from menus at once.