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16S rRNA RefSeq: V15.22    Genomic RefSeq: V9.15
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Gemella morbillorum (HMT-046)
Taxon Description:
This species was formerly known as Streptococcus morbillorum but was moved to Gemella on the basis of phylogenetic analysis based on 16S rRNA sequence comparisons.

Disease Associations:
Although found as part of the normal microbiota of the mouth and gastrointestinal orogenital tracts Gemella morbillorum is capable of causing a wide range of infections. Most of these can be attributed to spread via the bloodstream and thus infective endocarditis is the commonest. Other infections include meningitis brain liver and lung abscess osteomyelitis and septic thrombophlebitis.

Prevalence and Source:
Found in dental plaque on the tongue and has been isolated from periodontal pockets in periodontitis and exudate from pericoronitis associated with erupting third molars
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Class: Bacilli
Order: Bacillales
Genus: Gemella
Species:Gemella morbillorum
Status: Named - Cultured
Type/Reference Strain: ATCC 27824
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Former Names or Synonyms:
Diplococcus morbillorum
Peptostreptococcus morbillorum
Streptococcus morbillorum
16S rRNA Reference Sequences:    view in
RefSeq tree
RefSeq ID: 046_3366
RefSeq ID: 046_4327

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Genotypic Description:
Phenotypic Characteristics: Gram positive cocci found in pairs or short chains. Weakly fermentative and generally unreactive in commonly used biochemical and physiological tests and thus difficult to definitively identify by phenotypic means; molecular identification is recommended [1].
Cultivability: Facultative anaerobe producing small (<0.5 mm diameter) colonies after two days aerobic growth on Blood Agar plates. It is reported that anaerobic incubation may be required for growth on initial isolation but that strains become aerotolerant on subsequent subcultures.
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Microbial Ecology
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NCBI Taxon ID: 29391 [Link to NCBI]
PubMed Searches:
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[NCBI (Entrez) Nucleotide Link]
[NCBI (Entrez) Protein Link]
Number of
Genome Sequences:
1 See List
Phylogenetic Trees:
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[1] La Scola B, Raoult D. Molecular identification of Gemella species from three patients with endocarditis. J Clin Microbiol. 1998 Apr;36(4):866-71