16S rRNA Refseq V15.22 Genomic RefSeq V9.14
Human Oral Microbiome Taxon Description
Abiotrophia defectiva
Human Microbial Taxon ID:389Body Site:Oral
Named - Cultured
Streptococcus defectivus
Strain Information:
ATCC 49176
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NCBI Taxonomy ID:
16S rRNA Reference Sequences:
HOMD RefSeq ID: 389_0541

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PubMed Search:74  [PubMed Link]
Nucleotide Search:308  [Entrez Nucleotide Link]
Protein Search:3903  [Entrez Protein Link]
By molecular cloning:
Clones seen = 236 / 34879 = 0.677%
Rank Abundance = 28
In other datasets:
Genome Sequence
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General Information:
Abiotrophia defectiva was originally named Streptococcus defectivus [6].  Fastidious streptococci that grew as satellite colonies around other microorganisms or in complex media enriched with cysteine were originally described as nutritionally variant streptococci (NVS) by Frenkel and Hirsch [7].  Kawamura et al. recognized that S. defectivus and other NVS were not members of the genus Streptococcus  and created the genus Abiotrophia [1] 

Requires 10 mg/l pyrixoxal hydrochloride or 100 mg/l L-cysteine for growth [1]
Phenotypic Characteristics:
Gram-positive cocci.  Nonmotile, nonsporulating, catalase negative, and oxidase negative.  Facultatively anaerobic with complex growth requirements.  Grows as satellite colonies adjacent to Staphylococcus epidermidis [1]. 
Prevalence and Source:
Abiotrophia defectiva is a common member of the human oral cavity, pharynx, intestine and urogenital tracts.  In a study examining the normal microflora of the oral cavity it was recovered from buccal, hard palate, tooth surface and subgingival sites [3].  
Disease Associations:

In a study of microbial risk indicators of early childhood caries, Abiotrophia defectiva was significantly more abundant in caries free vs caries active subjects [4].  The organism has also been associated with bacterial endocarditis [2,5]

PubMed database:
[1] Kawamura Y, Hou XG, Sultana F, Liu S, Yamamoto H, Ezaki T. Transfer of Streptococcus adjacens and Streptococcus defectivus to Abiotrophia gen. nov. as Abiotrophia adiacens comb. nov. and Abiotrophia defectiva comb. nov., respectively. Int J Syst Bacteriol. 1995 Oct;45(4):798-803  [PubMed]
[2] Christensen JJ, Facklam RR. Granulicatella and Abiotrophia species from human clinical specimens. J Clin Microbiol. 2001 Oct;39(10):3520-3  [PubMed]
[3] Aas JA, Paster BJ, Stokes LN, Olsen I, Dewhirst FE. Defining the normal bacterial flora of the oral cavity. J Clin Microbiol. 2005 Nov;43(11):5721-32  [PubMed]
[4] Corby PM, Lyons-Weiler J, Bretz WA, Hart TC, Aas JA, Boumenna T, Goss J, Corby AL, Junior HM, Weyant RJ, Paster BJ. Microbial risk indicators of early childhood caries. J Clin Microbiol. 2005 Nov;43(11):5753-9  [PubMed]
[5] Hashimoto T, Jodo S, Furusaki A, Kon Y, Amasaki Y, Atsumi T, Komatsu H, Shimokawa J, Yonezawa K, Koike T. A woman with infectious endocarditis caused by Abiotrophia defectiva. Intern Med. 2004 Oct;43(10):1000-4  [PubMed]
Non-PubMed database:
[6] Bouvet A, Grimont F, Grimont PAD Streptococcus defectivus sp. nov. and Streptococcus adjacens sp. nov., nutritionally variant streptococci from human clinical specimens. Int J Syst Bacteriol. 1989 Jul; 39(3):290-294  
[7] Frenkel A, Hirsch W Spontaneous development of L. forms of streptococci requiring secretions of other bacteria or sulphydryl compounds for normal growth Nature. 1961 191:728-730  
Curator:  Floyd Dewhirst
Creation Info:   Latest Modification:  tsute,  2017-05-02 18:24:57
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