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16S rRNA RefSeq: V15.23    Genomic RefSeq: V10.1
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Slackia exigua (HMT-602)
Taxon Description:

Disease Associations:
Adult periodontitis [5]Necrotic pulps [10]Dentoalveolar abscesses [1]

Prevalence and Source:
Has been isolated by at least 3 groups of investigatorsFound in most subjects with periodontitis by DNA hybridization (Wade unpublished)
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Class: Coriobacteriia
Order: Eggerthellales
Genus: Slackia
Species:Slackia exigua
Status: Named - Cultured
Type/Reference Strain:
[Check LPSN.dsmz.de]
[Check Global Catalogue of Microorganisms]
Former Names or Synonyms:
Eubacterium exiguum
Phylum: Actinobacteria
16S rRNA Reference Sequences:    view in
RefSeq tree
RefSeq ID: 602_1240
RefSeq ID: 602_4045

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Genotypic Description:
Phenotypic Characteristics: Gram positive non-spore forming non-motile bacillusObligate anaerobeCellular morphology: 0.5 x 1.0 um singly or in clumpsColonial morphology: translucent colonies < 1 mm diameter after prolonged incubation on BHI-blood agarNo detectable metabolic end-products after growth in PYGGAC content of DNA:60-64 mol%
(Anvi`o-server hosted on VAMPS)
Microbial Ecology
[Open Abundance/Prevalence Page for ]
NCBI Taxon ID: 84109 [Link to NCBI]
PubMed Searches:
[NCBI PubMed Link]
[NCBI (Entrez) Nucleotide Link]
[NCBI (Entrez) Protein Link]
Number of
Genome Sequences:
3 See List
Phylogenetic Trees:
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[1] Uematsu H, Sato N, Djais A, Hoshino E. Degradation of arginine by Slackia exigua ATCC 700122 and Cryptobacterium curtum ATCC 700683. Oral Microbiol Immunol. 2006 Dec;21(6):381-4
[2] Sato TE, Hoshino E, Uematsu H, Noda T. Predominant obligate anaerobes in necrotic pulps of human deciduous teeth. Microb Ecol Health Dis 1993 6:269
[3] Poco SE Jr, Nakazawa F, Ikeda T, Sato M, Sato T, Hoshino E. Eubacterium exiguum sp. nov., isolated from human oral lesions. Int J Syst Bacteriol. 1996 Oct;46(4):1120-4
[4] Booth V, Downes J, Van den Berg J, Wade WG. Gram-positive anaerobic bacilli in human periodontal disease. J Periodontal Res. 2004 Aug;39(4):213-20
[5] Nakazawa F, Hoshino E. DNA-DNA relatedness and phylogenetic positions of Slackia exigua, Slackia heliotrinireducens, Eggerthella lenta, and other related bacteria. Oral Microbiol Immunol. 2004 Oct;19(5):343-6
[6] Moore WE, Holdeman LV, Cato EP, Smibert RM, Burmeister JA, Ranney RR. Bacteriology of moderate (chronic) periodontitis in mature adult humans. Infect Immun. 1983 Nov;42(2):510-5
[7] Wade WG, Downes J, Dymock D, Hiom SJ, Weightman AJ, Dewhirst FE, Paster BJ, Tzellas N, Coleman B. The family Coriobacteriaceae: reclassification of Eubacterium exiguum (Poco et al. 1996) and Peptostreptococcus heliotrinreducens (Lanigan 1976) as Slackia exigua gen. nov., comb. nov. and Slackia hel Int J Syst Bacteriol. 1999 Apr;49 Pt 2:595-600
[8] Hashimura T, Sato M, Hoshino E. Detection of Slackia exigua, Mogibacterium timidum and Eubacterium saphenum from pulpal and periradicular samples using the Polymerase Chain Reaction (PCR) method. Int Endod J. 2001 Sep;34(6):463-70
[9] Wade WG, Lewis MA, Cheeseman SL, Absi EG, Bishop PA. An unclassified Eubacterium taxon in acute dento-alveolar abscess. J Med Microbiol. 1994 Feb;40(2):115-7
[10] Downes J, Munson MA, Spratt DA, Kononen E, Tarkka E, Jousimies-Somer H, Wade WG. Characterisation of Eubacterium-like strains isolated from oral infections. J Med Microbiol. 2001 Nov;50(11):947-51