US health officials note increasing cyclospora infections. People consumed contaminated iceberg lettuce. The parasite stays on the greens despite washing. Symptoms include watery diarrhoea, stomach cramps as well as exhaustion. Some cases persist weeks. New cases are emerging in multiple states. The CDC and FDA say toss any questionable lettuce now. Stay away from raw salads with iceberg lettuce for now. Restaurants must remove it from menus without delay.