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M164-3

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Stool: Shigella flexneri  – Shipped February 20, 2017 

HISTORY

A simulated stool sample, collected from a 25 year old traveler returning from the Caribbean, was sent to category A, and B laboratories.

Participants were expected to isolate, identify, and report Shigella flexneri; laboratories were also expected to perform susceptibility testing.

MAIN EDUCATIONAL POINTS from M164-3

  1. There are four species within the genus Shigella (dysenteriae, flexneri, boydii, and sonnei). Each species is more predominant in different areas of the world.
  2. MaldiTOF MS systems are unable to identify Shigella correctly.

Full critique (PDF)

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