Lynne Terry reports that the Foster Farms plant that was closed by the U.S. Department of Agriculture over unsanitary conditions has reopened.

The USDA gave the company the go-ahead to resume production Saturday at its Livingston, Calif., following treatment for cockroaches and other pests. The USDA closed the plant on Wednesday after the fifth sighting of the insects in the plant in five months.

The facility is one of three implicated in a nationwide salmonella outbreak that’s sickened more than 400 people. The USDA threatened to close all three plants in October, citing high salmonella rates, but backed down when Foster Farms promised to enact tighter food safety controls.

The USDA said in its suspension notice that Foster Farms would only be allowed to open the facility when it came up with a plan to eliminate the cockroaches and ensure they stay out of the facility. The USDA said the plan would need to identify the source of the problem and include a pest-control program and monitoring.