M212-4

Corneal scraping: Bacillus cereus – Shipped August 09, 2021

HISTORY

A simulated corneal scraping sample collected from a 37 year old male stone worker with eye injury was sent to category A laboratories. Participants were expected to identify and report Bacillus cereus.

MAIN EDUCATIONAL POINTS from M212-4

  1. Any isolate of the B. cereus group should be evaluated to exclude B. anthracis.
  2. Compared to other pathogens associated with any type of endophthalmitis, the bacterium B. cereus is an exceptionally virulent danger to the eye. B. cereus grows rapidly in the eye and possesses a complex cohort of virulence factors, making the window for successful therapeutic intervention is relatively short.

Full critique (PDF)

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