State health officials say a nationally-distributed pre-packaged salad mix is responsible for the outbreak of cyclospora that afflicted more than 220 people in Iowa and Nebraska in recent weeks.
Epidemiologist Dr. Thomas Safranek says detailed interviews of the people who were sickened zeroed in on a salad mix distributed in June:
The name of the company that distributed the salad bags is not being released and officials say the bags in question are long gone and are no longer on Iowa grocery store shelves.
The severe intestinal illness struck people in 16 states, but Iowa had the most cases at 143, while Nebraska reported 78 cases. Safranek says the investigation is still underway:
Health officials say the salad bags contained iceberg and romaine lettuce, carrots and red cabbage.
Investigators determined that people in about 80-percent of the cases had been exposed to this same type of salad greens. No local produce was involved.