From the CDC:

November 1, 2010, through February 9, 2011, 140 individuals infected with the outbreak strain of Salmonella serotype I 4,[5],12:i:-, whose illnesses began since November 1, were reported from 26 states and the District of Columbia. Results of the investigation indicated a link to eating Tiny Greens Alfalfa Sprouts or Spicy Sprouts at Jimmy John’s restaurant outlets.

Testing by the U.S. Food and Drug Administration (FDA) of one environmental (water run-off) sample identified Salmonella serotype I 4,[5],12:i:- that was indistinguishable from the outbreak strain.