By August 1, 2010, there were a total of 75 individuals infected with a matching strain of Salmonella Hartford from 15 states, and a total of 80 individuals infected with a matching strain of Salmonella Baildon from 15 states.
Among those infected with Salmonella Hartford, illnesses began between April 30 and July 18, 2010. Among those infected with Salmonella Baildon, illness began between May 11 and July 19, 2010. Most Salmonella outbreak victims reported eating at Taco Bell in the week before illness.
The FDA worked with the CDC to conduct a traceback investigation but found that no specific food item or ingredient used at Taco Bell restaurants was associated with the two Salmonella outbreak strains.