Food safety experts probe Salmonella cluster

By Lisa Baertlein

LOS ANGELES (Reuters) - U.S. food safety officials on Monday said they hope that a cluster of nine cases of Salmonella poisoning yields clues that lead them to the source of an outbreak that has sickened 277 people in 28 states.

David Acheson, director of food safety for the U.S. Food and Drug Administration, said the cluster is confined to a single geographic location and that all of the sickened individuals appeared to have eaten similar types of tomatoes.

"It's essentially a very solid lead for us," Acheson said, in a conference call with reporters.

Acheson and other officials declined to say whether the cluster they were referring to were nine cases reported by the Chicago Department of Health.

Those individuals reportedly ate at two restaurants from the same restaurant chain, according to published reports, which did not name the company. The FDA also declined to identify the eateries involved saying the information was confidential.

A Chicago Department of Health spokesman was not immediately available for comment.

U.S. food safety officials said they continue to believe that the outbreak is not linked to a single restaurant or grocery store chain.

McDonald's Corp, the world's largest restaurant chain, said over the weekend that its U.S. restaurants would resume serving tomatoes.