Blood culture: Leptotrichia buccalis – Educational challenge – Shipped November 2014
The challenge was sent to category A laboratories. The sample was a simulated blood culture obtained from an 18 year old, male patient with febrile neutropenia.
Participants were expected to isolate and identify Leptotrichia buccalis.
MAIN EDUCATIONAL POINTS from M143-5
- Leptotrichia is a gram negative, fusiform, commensal oral anaerobe that is an emerging pathogen, particularly in immunocompromised hosts.
- Leptotrichia may be misidentified as Fusobacterium, Lactobacillus, or Capnocytophaga without the aid of molecular methods, due to a propensity of young cultures to retain Gram stain, and old cultures to grow in CO2.