The National Institute for Public Health and the Environment said the salmon has been traced to the Dutch company Foppen, which sells fish to many major Dutch supermarkets and to stores around the world, including the United States. The institute said in a statement that around 200 people - and likely more - in the Netherlands and more than 100 people in the United States have been sickened by a strain of the bacteria called Salmonella Thompson. Harald Wychgel, a spokesman for the Dutch public health institute, said the institute got its information on Americans becoming ill from the U.S. Centers for Disease Control and Prevention. However, a representative for the CDC said the agency was investigating and had not confirmed any illnesses. Costco Wholesale Corp., which sold the salmon in the U.S., said it had no reports of illness. FILE- This Sunday, Dec. 2004 file photo, shows smoked salmon on toasted rye rounds with dilled cream cheese and sour cream. Smoked salmon tainted with salmonella bacteria has sickened hundreds of people in the Netherlands and the United States, sparking a major recall health authorities said Tuesday, Oct. 2, 201. (AP Photo/Mike Hentz, File) Close It was not immediately clear how much contaminated fish had been sold in America; a Costco representative did not immediately have that information. Costco got a call from Foppen regarding the recall late Monday afternoon, said Craig Wilson, vice president of food safety at Costco. He said Costco immediately pulled the items from shelves and blocked its sale in stores, meaning the products won't scan at registers. The smoked salmon was sold under the Foppen name, as well as under Costco's store-brand name, Kirkland. Customers who purchased the items will be called by the company Tuesday to notify them of the recall, Wilson said. The calls will be followed up with a letter. Wilson said Costco's independent testing of the smoked salmon hasn't yet turned up any positive results for salmonella. He said the company has not received any reports of illnesses. De Vries said Foppen did not believe contaminated fish had been sold to any other countries. Associated Press writer Candice Choi in New York contributed.