The Trump administration delayed a rule last year that could have sped up the effort to pinpoint the source of the contamination. Critics charge that food safety oversight has eroded overall.
Last year the Food and Drug Administration cut a program that tracked cyclospora outbreaks and delayed a rule that would have required companies to swiftly provide supply chain records in investigations of foodborne disease outbreaks.
As the Trump administration drops charges against corporations and the wealthy, it is also taking aim at small-scale fraud cases, including against the operator of a weathered food truck in California.