Two new Escherichia coli O groups: O172 from "Shiga-like" toxin II-producing strains (EHEC) and O173 from enteroinvasive E. coli (EIEC).

@article{Orskov1991TwoNE,
  title={Two new Escherichia coli O groups: O172 from "Shiga-like" toxin II-producing strains (EHEC) and O173 from enteroinvasive E. coli (EIEC).},
  author={Ida Orskov and ipke. wachsmuth and David J. Taylor and Peter D. Echeverria and Bernard Rowe and Riichi Sakazaki and Frits Orskov},
  journal={APMIS : acta pathologica, microbiologica, et immunologica Scandinavica},
  year={1991},
  volume={99 1},
  pages={30-2}
}
Two Escherichia coli strains were established as antigenic test strains for two new O groups, O172 and O173. The O172 strain (EHEC) which produces "Shiga-like" toxin II (verocytotoxin 2) was isolated from a case of haemorrhagic colitis while the enteroinvasive O173 strain (EIEC) originated from a child with diarrhoea.