CDC: Mysterious Salmonella Outbreak Spreads to 29 States

This scanning electron micrograph image shows red-colored Salmonella sp. Bacteria in the process of invading a mustard-colored, ruffled immune cell. (National Institute of Allergy and Infectious Diseases (NIAID))

A nationwide salmonella outbreak from a mysterious source has now spread to 29 states, according to an update from the Centers for Disease Control and Prevention (CDC).

The outbreak has sickened nearly 280 people and more than two dozen have been hospitalized, said the federal health agency in its latest update on Sept. 23.