US officials declare an end to record-setting cyclospora outbreak, but its origin is still unknown

NEW YORK (AP) — The largest cyclospora food poisoning outbreak in U.S. history is over, U.S. health officials said Friday.

U.S. Food and Drug Administration officials said they are confident that all recalled iceberg lettuce related to this specific outbreak is off the market.

Nearly 13,000 reported cyclospora cases were tied to the multistate outbreak, federal officials say. They represent the bulk of an unprecedented surge in the parasitic diarrheal illness this year.

Even with the outbreak deemed over, several questions remain, including about its origin. The parasite is spread through human feces, and it still isn’t clear how sewage could have contaminated enough food to sicken so many people.

“This contamination can happen if produce is grown in soil or comes into contact with wa...