NCIt definition : A species of facultatively anaerobic, Gram-negative rod shaped bacteria assigned to
the phylum Proteobacteria. This E. coli serogroup may or may not be motile and contains
both Shiga-toxin producing and nonproducing stains of bacteria. E. coli O157 was isolated
from livestock and is a food borne pathogen that causes diarrhea and hemolytic uremic
syndrome in humans.;
Alternative definition : CDISC: Any bacterial organism that can be assigned to the species Escherichia coli
and serogroup O157.;