US health officials note more cyclospora infections. People consumed contaminated iceberg lettuce. The parasite remains on the greens despite washing. Symptoms include watery diarrhoea, stomach cramps plus exhaustion. Some cases continue weeks. New cases are emerging in various states. The CDC and FDA say discard any questionable lettuce now. Avoid raw salads with iceberg lettuce for now. Restaurants must take out it from menus at once.