American health officials report increasing cyclospora infections. People ate contaminated iceberg lettuce. The parasite clings on the greens regardless of washing. Symptoms cover watery diarrhoea, stomach cramps and exhaustion. Some cases persist weeks. New cases are emerging in multiple states. The CDC and FDA say toss any suspect lettuce now. Skip raw salads with iceberg lettuce for now. Restaurants must remove it from menus without delay.