BATTLE CREEK, Mich. - Kellogg Co. said Monday federal authorities have confirmed that salmonella was found in a single package of its peanut butter crackers, as a Midwestern grocer recalled some of its products because of the scare.

Kellogg had recalled 16 products last week because of the possibility of salmonella contamination.

On Monday, the company based in Battle Creek said that contamination was confirmed by the Food and Drug Administration in a single package of Austin Quality Foods Toasty Crackers with Peanut Butter.

Food companies and retailers have been recalling products with peanut butter in them because of suspicion of contamination amid a salmonella outbreak that has killed at least six people and sickened more than 470 others in 43 states. At least 90 people have been hospitalized.

Also Monday, Midwestern grocer and retailer Meijer Inc. said it was recalling two types of crackers and two varieties of ice cream because of the possibility of salmonella contamination: Meijer brand Cheese and Peanut Butter and Toasty Peanut Butter sandwich crackers, and Peanut Butter and Jelly and Peanut Butter Cup ice cream.

It was not immediately clear how many packages of Kellogg crackers had been tested, if more tests were being made on other products or if some had already been found not have salmonella, Kellogg spokeswoman Kris Charles said.

The government on Saturday had advised consumers to avoid eating cookies, cakes, ice cream and other foods containing peanut butter until health officials learn more about the contamination.

Officials have been focusing on peanut paste and peanut butter made at Peanut Corporation of America's plant in Blakely, Ga.

On Sunday, PCA expanded its own recall to all peanut butter and peanut paste produced at the Blakely plant since July 1.

Salmonella, a bacteria, is the most common cause of food poisoning in the United States, causing diarrhea, cramping and fever.