| [enterohemorrhagic escherichia coli and its infection: from 1977 to 1995]. | in 1997, konowalchuk and coworkers reported a toxin produced by escherichia coli that was cytotoxic to vero cells. this toxin(vero toxin, vt) was subsequently found to be an important virulence factor of e. coli associated with an outbreak of hemorrhagic colitis due to e. coli o157:h7 which occurred in the state of oregon and michigan in us. e. coli o157:h7 was then found to produce vt, which was cross-reactive with shiga toxin produced by shigella dysenteriae. vt(shiga-like toxin shiga toxin, s ... | 1997 | 9086772 |