Eight more people -- mostly young children -- infected, bringing total to 79, CDC says-- Eight more cases of people becoming infected with Salmonella traced to dry dog food have been identified. The outbreak, which started in 2006, marks the first time that dry dog food has been identified as a source of the bacterial infection in people.As of Oct. 31, 79 cases of Salmonella Schwarzengrund had been reported in 21 states. Most of the cases involved children 2 years old and younger, according to the federal Centers for Disease Control and Prevention.The dog food has been traced to a Mars Petcare U.S. plant in Everson, Pa. On Sept. 12, the company announced a recall of approximately 23,109 tons of dry dog and cat food sold under 105 brand names. The plant is now closed, the CDC said in the Nov. 7 issue of its Morbidity and Mortality Weekly Report.In late 2007, the plant was shut down for several months for remodeling, cleaning and disinfection, Barton Behravesh said. Young children are particularly vulnerable, because they're more likely to get sick from small doses of salmonella, Barton Behravesh said.