CSF: Listeria monocytogenes – Shipped August 15, 2016


A simulated CSF collected from a 78 year old patient with headache and fever was sent to category A laboratories.

Participants were expected to report Listeria monocytogenes, to perform and/or report susceptibility results, and to report the organism to Public Health authorities.



  1. Listeria monocytogenes is one of the three most common organisms causing bacterial meningitis in adult patients. Proper handling and interpretation of CSF specimens for this organism is critical for both patient management and public health concerns.
  2. Antimicrobial susceptibility testing does not need to be performed routinely but guidance regarding the predictable susceptibility to ampicillin, and importantly the resistance to all cephalosporins, should be provided.
  3. Isolates from clinical samples should be forwarded to reference laboratories for typing to assist with identification and investigation of potential outbreaks.

Full critique (PDF)

Posted in Clinical Bacteriology Results, critiques Tagged with: