M121-4

Blood Culture: Saccharomyces cerevisiae – Shipped May 2012

HISTORY

The challenge was sent to category A laboratories. The sample was a simulated blood culture obtained from a 70 year old ICU patient with history of treatment for Clostridium difficile infection (CDI).

Participants were expected to isolate and identify Saccharomyces cerevisiae . No susceptibility was required as the challenge was sent for identification purposes only.

MAIN EDUCATIONAL POINTS from M121-4

  1. Yeasts recovered from blood cultures should be identified to the species level. Laboratories that do not routinely identify yeasts in house should immediately refer the isolate to a reference laboratory for identification and susceptibility testing.
  2. Patients with antibiotic associated diarrhea who are taking probiotics that include Saccharomyces, particularly immunocompromised patients may develop a bloodstream infection.

Full critique (PDF)

Posted in Clinical Bacteriology Results, critiques