Leptotrichia buccalis

Leptotrichia buccalis is an anaerobic, Gram-negative rod bacteria. It is a constituent of normal oral flora.
"Leptotrichia buccalis" can be clearly identified using live blood analysis in dark field. They have a distinct form, which separates them from other rod forms.
Morphology.
"Leptotrichia" species are typically large, fusiform-shaped, non-sporulating, and non-motile rods. <ref>