ASSOCIATION OF VEROTOXIN-PRODUCING ESCHERICHIA-COLI AND VEROTOXIN WITH HEMOLYTIC-UREMIC SYNDROME

It has been over 10 years since we first showed an association [1] bet ween classical hemolytic uremic syndrome (hemolytic anemia, thrombocyt openia, and uremia, following a diarrheal prodome) and certain E. coli [1] capable of producing a toxin, initially called verotoxin (VT) bec ause of its cytopathic effect on Vero cells [2] and later Shiga-like t oxin (SLT) because of the toxin's close biological and structural simi larity to Shiga toxin. Although we initially reported that 75% of chil dren with idiopathic hemolytic uremic syndrome (HUS) [1] had evidence of a verotoxin-producing E. coil (VTEC) [1], a later study showed that over a seven year period (1980-86), of 86 children seen with HUS, 91% had a classical presentation and 88% of these had evidence of a VTEC infection [3]. This paper traces the path of the incriminating organis ms (VTEC) from the time of ingestion, up to and including internalizat ion of the toxin into a target cell; in vitro experiments demonstratin g the effect of toxin on endothelial cells are included. It is hoped t hat we might gain a clearer insight into factors that might predispose an individual to contracting HUS. Once a better understanding of the pathogenesis of VTEC associated HUS is known, areas for therapeutic in tervention might be realized.