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M164-4

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Intraocular fluid: Bacillus cereus – Shipped February 20, 2017

HISTORY

A simulated intraocular fluid sample collected from 34 year old stone worker with eye injury and pain was sent to category A laboratories. Participants were expected to identify and report Bacillus cereus.

MAIN EDUCATIONAL POINTS from M164-4

  1. Bacillus species (usually B.cereus) and coagulase-negative staphylococci are the most common causes of post-traumatic endophthalmitis.
  2. Vitreous washings are positive in 75-90% of cases of bacterial endophthalmitis.

Full critique (PDF)

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