Human Oral Microbiome Taxon Description
Campylobacter gracilis
Human Oral Taxon ID (HOT):623Synonym:
Bacteroides gracilis
Named - Cultured
Type Strain:
More info at StrainInfo
NCBI Taxonomy ID:
16S rRNA Sequence:
L04320  [Entrez Link]
PubMed Search:42  [PubMed Link]
16S rRNA Alignment: View Alignment         Download Alignment         NoteNucleotide Search:455  [Entrez Nucleotide Link]
Phylogeny: View 16S rRNA tree         View all Tree filesProtein Search:5696  [Entrez Protein Link]
Prevalence by Molecular Cloning:
Clones seen = 362 / 34879 = 1.04%
Rank Abundance = 16
Genome Sequence
2 View Genomes
Hierarchy Structure:    Hide or show the hierarchy structure
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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