By Michael J. Critelli | MakeUsWell Newsletter,
On July 20, 2026, The Wall Street Journal reported an embarrassing reversal by the Food and Drug Administration.
On July 18, 2026, the FDA had said that a sample of iceberg lettuce supplied by Taylor Farms from central Mexico had tested positive for Cyclospora, the microscopic parasite associated with a major outbreak of gastrointestinal illness. After reviewing the laboratory data, FDA concluded that the result did not represent “true amplification” and should be considered a false positive. As of July 19, 2026, the agency had no confirmed positive product samples.
That reversal might appear to demonstrate that our food-testing system is unreliable.
The more important lesson is different: no laboratory test, however sophisticated, can carry the entire burden of keeping food safe.