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Scientific classification
Domain: Bacteria
Phylum: Firmicutes
Class: Bacilli
Order: Lactobacillales
Family: Aerococcaceae
Genus: Abiotrophia
Y. Kawamura et al. 1995[1]
Type species
A. defectiva

See text

Abiotrophia is a genus of lactic acid bacteria, a family in the phylum Firmicutes (Bacteria).


The genus contains 4 species of coccus shaped species,[2] 2 are former members of the genus Streptococcus, which were transferred in 1995 to the newly coined genus Abiotrophia:[1]

  • A. adiacens ( (Bouvet et al. 1989) Kawamura et al. 1995; Latin feminine gender adjective adiacens, adjacent, indicating that this organism can grow as satellite colonies adjacent to other bacterial growth.)
  • A. defectiva ( (Bouvet et al. 1989) Kawamura et al. 1995, comb. nov. (Type species of the genus).; Latin feminine gender adjective defectiva, deficient.)[3]

Other 2 are latter additions:


The name Abiotrophia derives from: Greek prefix ἄ (a)-, negative (un-); Greek noun βιος (bios), life; Greek noun τροφιά (trophia), nutrition; New Latin feminine gender noun Abiotrophia, life-nutrition-deficiency.[2]

Genome Sequence[edit]

For the Human Microbiome Project (HMP), the genome of Abiotrophia defectiva ATCC 49176 has been sequenced (assembly) as it is a resident of human oral cavity and urogenital and intestinal tracts and is a cause of infective endocarditis. showing it to have 3291 protein encoded in a 3.4774 Mbp genome with a GC content or 37.0% [6]


Formerly classified as nutritionally variant streptococci, A. elegans had been identified as a cause of 1 to 2% of blood culture negative bacterial endocarditis.[7]


External links[edit]