US health officials note increasing cyclospora infections. People ingested unsafe iceberg lettuce. The parasite clings on the greens regardless of washing. Symptoms comprise watery diarrhoea, stomach cramps plus exhaustion. Some cases persist weeks. New cases are appearing in various states. The CDC and FDA say discard any risky lettuce now. Stay away from raw salads with iceberg lettuce for now. Restaurants must take out it from menus at once.