Paratractidigestivibacter faecalis

Paratractidigestivibacter faecalis is a Gram-positive and strictly anaerobic bacterium in the in the genus Paratractidigestivibacter and family Atopobiaceae. It was first described as Olsenella faecalis in 2019 after isolation from a human fecal sample in South Korea.^[1] It has also been isolated from the feces of pigs in Canada.^[2]

Paratractidigestivibacter faecalis
Scientific classification
Domain:	Bacteria
Kingdom:	Bacillati
Phylum:	Actinomycetota
Class:	Coriobacteriia
Order:	Coriobacteriales
Family:	Atopobiaceae
Genus:	Paratractidigestivibacter
Species:	P. faecalis
Binomial name
Paratractidigestivibacter faecalis (Han et al. 2019) Zgheib et al. 2021
Type strain
JCM 32256; DSM 103684
Synonyms
Olsenella faecalis Han et al. 2019

In 2021, phylogenomic analyses supported transfer to a new genus, yielding the combination Paratractidigestivibacter faecalis.^[3]

Taxonomy

Comparative genomic and phylogenetic data showed strain JCM 32256 forms a distinct lineage within Atopobiaceae; therefore, Zgheib et al. established the genus Paratractidigestivibacter and the new combination P. faecalis.

Morphology and physiology

Cells are rod-shaped, non-motile, non-spore-forming and strictly anaerobic. Colonies on reinforced clostridial agar are round and cream-coloured. Optimal growth occurs at 37 °C and pH 7.0.

Etymology

• faecalis – Latin genitive adjective "of faeces", indicating the source.
• Paratractidigestivibacter – from Greek para- "beside", Latin tractus digestivus "digestive tract", and Neo-Latin bacter "rod."