Background: Though automated identification and sensitivity testing has established itself as a standard in many high throughput clinical microbiology laboratories, misidentification by the automated systems can also happen.
Case Report: Here we present a case of sepsis, caused by a commensal inactive Escherichia coli, which had been repeatedly misidentified as Shigella sonnei by VITEK 2 compact.
Conclusions: The laboratory worker should always be aware of possible misidentification and limitations of automated systems.
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