Blood: Bacillus thuringiensis – Shipped February 08, 2021
A simulated blood culture sample collected from 8 year old neutropenic female with leukemia, sample drawn from central line was sent to category A laboratories. Participants were expected to identify Bacillus thuringiensis and report susceptibility.
MAIN EDUCATIONAL POINTS from M204-5
- Isolates of Bacillus spp. should be always be considered in the context of the patient, and not simply dismissed as contaminants – particularly when recovered from sterile fluids.
- B. cereus is a well recognized opportunistic pathogen, and, along with B. thuringiensis (although more rarely) has been shown to cause infection in immunocompromised individuals – susceptibility testing should always be performed when these organisms are isolated from sterile sites.
- Any isolate of the B. cereus group should always be evaluated to exclude B. anthracis.