NEW : European Union officials to meet Wednesday to discuss the problem . French officials seek to inventory list of food supplier for tainted meat . Romanian officials say the problem does n't involve slaughterhouses in their country . As many as 16 nations may be involved in the chain .
NEW : European Union officials to meet Wednesday to discuss the issue . French officials seek to inventory customers of food supplier for tainted products . Romanian officials say the problem does n't involve slaughterhouses in their country . As many as 16 nations may be involved in supply chain .