Company lowers financial outlook after troublesome signs in U.S. beef market.

Same-store sales remained positive; operators less optimistic about the economy.

Case-patients have been identified in Washington with illness onset dates ranging from April 25, 2015 to July 21, 2015.

Products were not presented at the U.S. point of entry for inspection.

The company recorded sales from continuing operations of $820.8 million for the second quarter of 2015.