Escherichia coli: O157:H7
Watershed Science Institute , 2000


Escherichia coli (E. coli) O157:H7 is a potentially deadly fecal bacteria that can cause bloody diarrhea and dehydration in humans. Bacteria are a group of micro-organisms (fig. 1) that live in soil or water and on plants and animals. The combination of letters and numbers in the name of this bacterium refers to the specific molecular markers found on its cell surface that distinguish it from other types of E. coli.