FDA Reverses Positive Test Finding in Cyclospora Investigation, But Still Says Lettuce Is Behind Outbreak
- Posted on July 20, 2026
- By International Business Times
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- 1 min read
In brief
The FDA disclosed that laboratory analysis initially suggesting Cyclospora parasite contamination in shredded iceberg lettuce was actually incorrect. Despite this laboratory setback, federal health officials maintain their epidemiological investigation strongly indicates lettuce as the primary source of the outbreak. The agency continues monitoring the situation while clarifying the distinction between definitive laboratory evidence and investigative findings based on illness patterns and consumer exposure data.
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FDA Reverses Positive Test Finding in Cyclospora Investigation, But Still Says Lettuce Is Behind Outbreak
The U.S. Food and Drug Administration acknowledged that a laboratory test that appeared to detect the Cyclospora parasite in shredded iceberg lettuce was actually a false positive.
