Escherichia coli O121

Escherichia coli O121 is a pathogenic serotype of Escherichia coli,[1] associated with Shiga toxin, intestinal bleeding, and hemolytic-uremic syndrome (HUS).[2] HUS, if left untreated, can lead to kidney failure.

Most serotypes of E. coli—a widespread species of bacteria residing in the lower intestines of mammals—are beneficial or do not cause disease. Unlike other pathogenic serotypes, such as E. coli O157:H7 (also an enterohemorrhagic E. coli), little is known in detail about the public health significance of O121. Therefore, O121 is sometimes roughly classified as a type of “non-O157 Shiga toxin–producing E. coli ” (non-O157 STEC).

  1. ^ "Laboratory-Confirmed Non-O157 Shiga Toxin Producing E. Coli". Centers for Disease Control and Prevention. Retrieved March 16, 2007.
  2. ^ "E. coli outbreak sickens 24 in 15 states". Chicago Tribune. Reuters. March 31, 2013.
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