Pet Food
On March 15, 2007, a Canadian pet food manufacturer notified the US Food and Drug Administration that animals had died after eating its products. The next day, popular brands of pet food were withdrawn across the US while the FDA began its search for the cause. The prime suspect was contamination indicated by the presence of melamine, an industrial chemical found in plastics and resins. The FDA examined 210 samples of pet food and ingredients in six field laboratories. Of those, 130 tested positive for melamine either in the food itself or in wheat gluten used to thicken the gravy accompanying it. Researchers at Cornell University found crystals of melamine and cyanuric acid in urine and kidney tissue taken from dead cats, New Scientist reported. 'How melamine might have got into the pet food remains controversial,' the journal added. 'The FDA says it originated in wheat gluten and rice protein concentrate imported from mainland China that was added to the pet food by US manufacturers. American journalists have since reported that factory owners in China have admitted to routinely adding melamine to such products to boost their nitrogen content, and so make it appear that they contain more protein that they actually do. China explicitly banned this practice on April 26, 2007, though officials dispute any suggestion that melamine from their country could have been responsible for killing America's pets.
Read more about this topic: 2007 Chinese Export Recalls
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