In addition, the agency says melamine has been found in some pet food products in rice protein concentrate from China. those products have been withdrawn from market.

另外，该机构还表示在来自中国的用于宠物食品的大米蛋白质浓缩物中三聚氰胺，这些产品已经退出市场。

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The agency has also found melamine in pet food containing rice protein concentrate, and recently began testing animal feed and human-food additives for melamine contamination.

最近，监督局开始对动物喂养和人类食物中的添加剂做三聚氰胺污染的实验。

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Officials said the team is concentrating on more than the two companies believed to have exported the melamine in wheat flour mislabeled as wheat gluten and rice protein concentrate.

CNN: FDA: Melamine-tainted poultry, fish safe for humans