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Abstract zur Publikation: Sorbitol-fermenting enterohaemorrhagic Escherichia coli O157:H causing another outbreak of Haemolytic Uraemic Syndrome among children in Germany

Alpers K, Werber D, Frank C, Koch J, Friedrich AW, Karch H, An der Heiden M, Prager R, Fruth A et al. (2009): Sorbitol-fermenting enterohaemorrhagic Escherichia coli O157:H causing another outbreak of Haemolytic Uraemic Syndrome among children in Germany
Epidemiol. Infect. 137 (3): 389-395. Epub Feb 9.

An outbreak of haemolytic uraemic syndrome (HUS) among children caused by infection with sorbitol-fermenting enterohaemorrhagic Escherichia coli O157:H- (SF EHEC O157:H-) occurred in Germany in 2002. This pathogen has caused several outbreaks so far, yet its reservoir and routes of transmission remain unknown. SF EHEC O157:H- is easily missed as most laboratory protocols target the more common sorbitol non-fermenting strains. We performed active case finding, extensive exploratory interviews and a case-control study. Clinical and environmental samples were screened for SF EHEC O157:H-  and the isolates were subtyped by pulsed-field gel electrophoresis. We identified 38 case-patients in 11 federal states. Four case-patients died during the acute phase (case-fatality ratio 11%). The case-control study could not identify a single vehicle or source. Further studies are necessary to identify the pathogen’s reservoir(s). Stool samples of patients with HUS should be tested with an adequate microbiological setup to timely recognize SF EHEC O157:H-.

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