E. coli bacteria are found in healthy bodies, but some forms can cause illness, paralysis, and even death. This title, aimed at students in Grades 8+, traces the history of this mutating menace, reviews efforts to contain outbreaks, and examines where medical science is in efforts to find treatments. The title includes a timeline on the discovery, treatment, and outbreaks of E. coli, and sidebars on people adversely affected by the bacteria.