The offending strain in both the current outbreak, and a major outbreak in June, is E. coli O157:H7, which is a less common strain typically associated with cattle or other livestock.[1] CDC analysis (also helpfully linked by craftyguy) of the previous outbreak of this strain, which hospitalized or killed people in 36 states, found that the source was contaminated canal water used for irrigation near Yuma AZ.[2] A la…
https://en.wikipedia.org/wiki/2006_North_American_E._coli_O1...
http://www.washingtonpost.com/wp-dyn/content/article/2006/09...