PubMed · 5208284
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J Altaras, J Novak, I Dimcev. 1970. [Postirradiation proctocolitis].. https://pubmed.ncbi.nlm.nih.gov/5208284/
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Infection due to enterohemorrhagic Escherichia coli (EHEC) has not been described in immunosuppressed patients. We recently saw a case of EHEC infection caused by a novel Shiga toxin II-producing Escherichia coli serotype (O121:H19) that caused hemorrhagic colitis in a patient with renal and cardiac transplants. The patient's signs, symptoms, and colon pathology were similar to reports of EHEC infection in immunocompetent patients. This case suggests that the immunosuppressed state may not alter the clinical presentation or histopathologic findings of this disorder. Assays for EHEC are not routinely done at most hospitals. Therefore, clinicians caring for transplant patients should be aware of the typical clinical presentation of EHEC infection, so that they can initiate appropriate laboratory investigation in suspected cases.
Shigella dysenteriae and Shiga-toxin-producing Escherichia coli (STEC) elaborate the AB holotoxins, Shiga or Shiga-like toxins (Stx). Stx play a major role in the pathogenesis of haemorrhagic colitis and haemolytic uremic syndrome. This review provides an overview of the mechanisms of action of Stx and a model of the pathogenesis of Stx-induced disease.