WASHINGTON — Livestock feed ingredients shipped to nine states may have been contaminated with cattle remains in violation of a 1997 ban to protect against mad cow disease, a manufacturer said Tuesday.

Nebraska was not among the states to which the feed was shipped.

H.J. Baker & Bro. Inc. of Westport, Conn., said it was recalling three livestock feed ingredients, including two used to supplement feed given to dairy cows.

A sample tested by the Food and Drug Administration was positive for cattle meat and bone meal, said Mark Hohnbaum, president of the company’s feed products group.

“This is very concerning to us. This isn’t something that happens to us. We are very serious about food safety,” Hohnbaum said.

The company shipped the ingredients to feed manufacturers and dairy farms in the following states: Alabama, California, Florida, Georgia, Kentucky, Louisiana, Michigan, Mississippi and Tennessee.  The company is notifying its customers of the voluntary recall. It does not know how much of the feed ingredients it sold, Hohnbaum said.

Mad cow disease is only known to spread when cows eat feed containing brain and other nerve tissue from infected cattle. Protein from cattle was commonly added to cattle feed to speed growth until the ban largely outlawed the practice.

Cattle tissue may have contaminated two feed ingredients given to dairy cows — Pro-Lak and Pro-Amino II — made by H.J. Baker between August 2005 and June. The third of the recalled ingredients, Pro-Pak with Porcine Meat and Bone, was mislabeled. It is used in poultry feed.

The company announced the recall as FDA inspections continue at its Albertville, Ala. plant, Hohnbaum said. The inspections have found manufacturing and clerical issues, he added.

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On the Net:

Food and Drug Administration animal feed information: http://www.fda.gov/cvm/animalfeed.htm