American health officials report rising cyclospora infections. People ate tainted iceberg lettuce. The parasite stays on the greens even after washing. Symptoms comprise watery diarrhoea, stomach cramps as well as exhaustion. Some cases last weeks. New cases are emerging in several states. The CDC and FDA say discard any questionable lettuce now. Skip raw salads with iceberg lettuce for now. Restaurants must remove it from menus at once.