16S rRNA Refseq V15.22 Genomic RefSeq V9.14
Human Oral Microbiome Taxon Description
Campylobacter gracilis
Human Microbial Taxon ID:623Body Site:Oral
Named - Cultured
Bacteroides gracilis
Strain Information:
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NCBI Taxonomy ID:
16S rRNA Reference Sequences:
HOMD RefSeq ID: 623_4320

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PubMed Search:42  [PubMed Link]
Nucleotide Search:455  [Entrez Nucleotide Link]
Protein Search:5696  [Entrez Protein Link]
By molecular cloning:
Clones seen = 362 / 34879 = 1.04%
Rank Abundance = 16
In other datasets:
Genome Sequence
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General Information:
In 1981, four species were recognized as comprising what had previously been called Bacteroides corrodens [5].  o­ne of these organisms was called Bacteroides gracilis, but based upon 16S rRNA analysis, the organism was transferred to the genus Campylobacter [2]. 

Campylobacter gracilis is microaerophilic, but is stimulated o­n media containing formate and fumerate.

Phenotypic Characteristics:
Gram-negative, straight rods.  0.4 um by 4-6 um with both tapered and rounded ends.  May pit or corrode agar, or show twitching motility.  The mol% G + C of the DNA is 44-46%.    It does not ferment carbohydrates and produces mainly succinate from PYG. 
Prevalence and Source:
Campylobacter gracilis is a common member of subgingival plaque.  16S rRNA cloning studies indicate that it is generally the most common oral Campylobacter species identified.
Disease Associations:
Campylobactrer gracilis is a member of Socransky's Orange Complex and is associated with periodontal disease [3].  It has been recoved from primary endodontic infections [4].  It is occasionally isolated from systemic infections [1].
PubMed database:
[1] Johnson CC, Reinhardt JF, Edelstein MA, Mulligan ME, George WL, Finegold SM. Bacteroides gracilis, an important anaerobic bacterial pathogen. J Clin Microbiol.1985 Nov;22(5):799-802  [PubMed]
[2] Vandamme P, Daneshvar MI, Dewhirst FE, Paster BJ, Kersters K, Goossens H, Moss CW. Chemotaxonomic analyses of Bacteroides gracilis and Bacteroides ureolyticus and reclassification of B. gracilis as Campylobacter gracilis comb. nov. Int J Syst Bacteriol.1995 Jan;45(1):145-52  [PubMed]
[3] Socransky SS, Haffajee AD, Cugini MA, Smith C, Kent RL Jr. Microbial complexes in subgingival plaque. J Clin Periodontol.1998 Feb;25(2):134-44  [PubMed]
[4] Siqueira JF Jr, R˘šas IN. Campylobacter gracilis and Campylobacter rectus in primary endodontic infections. Int Endod J.2003 Mar;36(3):174-80  [PubMed]
Non-PubMed database:
[5] Tanner ACR, Badger S, Lai CH, Listgarten MA, Visconti RA, Socransky SS. Wolinella gen. nov., Wolinella succinogenes (Vibrio succinogenes Wolin et al.) comb. nov., and description of Bacteroides gracilis sp. nov., Wolinella recta sp.nov., Campylobacter concisus sp. nov., a Int J Syst Bacteriol. 1981 31:432-445  
Creation Info:   Latest Modification:  wenhan,  2008-01-17 12:41:06
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