US health officials note rising cyclospora infections. People ingested contaminated iceberg lettuce. The parasite clings on the greens even after washing. Symptoms comprise watery diarrhoea, stomach cramps plus exhaustion. Some cases continue weeks. New cases are emerging in several states. The CDC and FDA say discard any risky lettuce now. Skip raw salads with iceberg lettuce for now. Restaurants must take out it from menus without delay.