Anaerobiospirillum

Anaerobiospirillum is a genus of Gram-negative, spiral-shaped, obligately anaerobic bacteria in the family Succinivibrionaceae. The genus was first described in 1976 based on the type species Anaerobiospirillum succiniciproducens which was isolated from from the gastrointestinal tract of humans.^[1] A second species, Anaerobiospirillum thomasii, was later described in 1997 based on isolates from the feces of domestic animals and humans with diarrhea.^[2]

Anaerobiospirillum
Scientific classification
Domain:	Bacteria
Kingdom:	Pseudomonadati
Phylum:	Pseudomonadota
Class:	Gammaproteobacteria
Order:	Aeromonadales
Family:	Succinivibrionaceae
Genus:	Anaerobiospirillum Davis et al. 1976
Type species
Anaerobiospirillum succiniciproducens
Species
Anaerobiospirillum succiniciproducens Anaerobiospirillum thomasii

Ecology

Anaerobiospirillum species have been isolated from the intestinal tracts of various animals, including cats, dogs, and pigs. Occasional human isolates suggest either zoonotic transmission or commensal presence in the human gut under certain conditions.

Clinical relevance

Although generally considered rare pathogens, members of the genus have been associated with human infections, including bacteremia, diarrhea, pyomyositis, and soft tissue infections. Infections are more frequently reported in immunocompromised individuals.^[3][4]

Species

The genus includes two validly published species:

• Anaerobiospirillum succiniciproducens – described in 1976 by Davis et al.
• Anaerobiospirillum thomasii – described in 1997 by Henry Malnick