China’s tainted milk crisis that sickened thousands of babies across the country continues to spread fear in other parts of the world. The Food and Drug Administration said Tuesday it had discovered the toxic contaminant melamine in one sample of infant formula sold in the United States. The toxic chemical was also discovered in several samples of dietary supplements that are made by the same manufacturers who make the infant formula.

“There’s no cause for concern or no risk from these levels,” said Judy Leon, an agency spokeswoman. Leon said the U.S. infant formula in September was determined not to be made with any Chinese ingredients. Leon suggested the sample that tested positive most likely became contaminated through the manufacturing process or through contact with can liners. Some food processing equipments in manufacturing units are cleaned with a solution that contains melamine, which can easily seep into the products.

The agency also found trace levels of melamine in several samples of medical formula supplements for the elderly, but the trace levels posed no health risk to adults.

FDA officials have not identified the manufacturer of the infant formula. The agency said the infant formula was not made with Chinese ingredients.

“Infant formula manufactured in the United States remains safe and nutritious,” industry trade group the International Formula Council said in a statement. “U.S. infant formula products meet the highest standards and specifications.”

Parents should not be changing the diet, the agency’s officials said. “If they’ve been feeding a particular product, they should continue to feed that product. That’s in the best interest of the baby.”

FDA's director for Center for Food Safety and Applied Nutrition, Dr. Stephen Sundlof, said that no melamine-induced human illness has been reported in the U.S.

Melamine-tainted formula was found earlier this year in China, where four babies died and more that 50,000 had become sick with kidney stones or kidney failure associated with the consumption of infant formula contaminated with melamine. Melamine, an industrial chemical product usually used to produce plastic materials, fertilizers and pesticides, is high in nitrogen and can cause kidney stones and other organ problems. The chemical was added to low-quality milk to boost its protein readings and fetch a higher price.

The growing scandal over tainted milk products has prompted many countries including Cambodia, Singapore, Indonesia, Japan, Australia, Thailand, Malaysia, Taiwan, and New Zealand, to ban, or recall Chinese dairy products.

Earlier this month, the FDA announced it was limiting the import of all products, including infant formula from China until they have been proved free of melamine. Furthermore, American infant formula manufacturers said they did not import ingredients from China. In September the Food and Drug Administration announced that some instant coffee and tea drinks containing a non-dairy creamer made in China had been recalled for fear of contamination with melamine. The FDA recommended that consumers avoid Mr. Brown instant coffee and White Rabbit candy and Blue Cat Flavor Drink, products which were all made in China.