The ongoing outbreak of cyclospora tied to iceberg lettuce has raised new concerns about the safety of imported produce and underscores a worrisome trend: The U.S. is conducting fewer inspections to catch contaminated food.

Federal health officials have scaled back FoodNet, a program that tracked food poisoning infections in the U.S. The Foodborne Diseases Active Surveillance Network has cut required monitoring to just two pathogens that cause infections, down from eight.

U.S. food inspectors documented unsanitary conditions at several Boar's Head deli meat plants, not just the Jarratt, Virginia, factory that was shut down last year.

The Food and Drug Administration's top food safety official has resigned.