Health officials say the Huntsville outbreak most likely was caused by contaminated lettuce served at Little Rosie’s between June 27 and June 30. Eighteen of the 19 known victims ate at the popular Mexican restaurant on Whitesburg Drive on those dates; the other infected person did not eat at Little Rosie’s and caught the bacteria another way.

Three Little Rosie’s customers have been in the hospital since about July 4 undergoing dialysis for kidney damage.