McDonald's Corp., poised to resume selling beef and chicken in China this week after a supplier was accused of repackaging old meat, says the matter is hurting the chain's results in Asia.

McDonald's Holdings Co. (Japan) said its sales in July fell 17.4 percent from a year before on a same-store basis, marking the largest monthly drop since July 2002.

"McDonald's businesses in China, Japan and certain other markets are experiencing a significant negative impact to results," the Illinois-based company said in a filing Monday.