Diamond Pet Foods has expanded a recall of its dry dog food, taking precautionary steps after several of its brands were linked to an outbreak of a rare strain of salmonella poisoning that infected at least 14 people in nine states.
The company said it was now pulling a total of nine brands of its dry dog food from the shelves. In April, it began the recall by pulling three brands.
The salmonella cases were found in humans who may have had contact with dogs or dog foods prior to their illness.
The additional brands have been recalled as a precaution and none had tested positive for salmonella, according to a statement issued by the company on Saturday.
The products were distributed in 16 states, mostly along the U.S. East Coast, and Canada.
Another dog food company, WellPet LLC, also said it was recalling one of its brands as a precaution.
Diamond first started pulling some brands of dog food produced at a South Carolina plant after salmonella infections were reported from Oct. 8, 2011, to April 22, and five people were hospitalized.
Cases were reported in Alabama, Connecticut, Michigan, Missouri, North Carolina, New Jersey, Ohio, Pennsylvania and Virginia.
Seven of 10 sick people said they had contact with a dog in the week before becoming sick.
And five of sickened people recalled the type of dog food with which they had contact, the Centers for Disease Control (CDC) and Prevention previously said in a statement.