A 3yearold Severely Ill Child Was Admitted To A Hospital

A 3-year-old severely ill child was admitted to a hospital with symptoms of diarrhea, fever, and malaise. Laboratory testing showed abnormal renal and liver values and anemia. She had no history of previous illness, and her food history was a recent meal of teriyaki beef consumed at a local restaurant.
a. What was the probable pathogen?
b. What was the likely source?
c. What is the pathologic effect of the pathogen?