| Gemella bergeri |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Firmicutes, Class Bacilli, Order Lactobacillales, Family Incertae sedis, Genus Gemella, Gemella bergeri corrig. Collins et al.
1998
Old synonym: Gemella bergeriae Collins et al. 1998
1998
Old synonym: Gemella bergeriae Collins et al. 1998
Gram-positive cocci (sometimes elongated), arranged in pairs, clusters or short
chains.
chains.
Colonies on blood agar plates after 2 days are small, circular, entire, low convex,
translucent to opaque, smooth & nonpigmented. Variable hemolysis on horse blood
agar. Facultatively anaerobic, growth at 37.0 ºC, no growth at 10 or 45 ºC. No growth in
6.5% NaCl broth. Bile esculin test is negative.
translucent to opaque, smooth & nonpigmented. Variable hemolysis on horse blood
agar. Facultatively anaerobic, growth at 37.0 ºC, no growth at 10 or 45 ºC. No growth in
6.5% NaCl broth. Bile esculin test is negative.
Isolated from human clinical specimens (blood from patient with endocarditis, oral cavity from patient with periodontitis).
Opportunistic human pathogen.
- Matthew D. Collins, Roger A. Hutson, Enevold Falsen, Berit Sjoden & Richard R. Facklam: Gemella bergeriae sp. nov., Isolated
from Human Clinical Specimens. JOURNAL OF CLINICAL MICROBIOLOGY, May 1998, p. 1290–1293. - Martin Dworkin, Stanley Falkow, Eugene Rosenberg, Karl-Heinz Schleifer, Erko Stackebrandt (Editors).: The Prokaryotes 3rd ed.: A
Handbook on the Biology of Bacteria Volume 4: Bacteria: Firmicutes, Cyanobacteria. 2006. - Matthew D. Collins And Enevold Falsen, 2009. Family XI. Incertae Sedis Genus I. Gemella Berger, 1960, 253AL. In: (Eds.) P.D.
Vos, G. Garrity, D. Jones, N.R. Krieg, W. Ludwig, F.A. Rainey, K.-H. Schleifer, W.B. Whitman. Bergey’s Manual of Systematic
Bacteriology, Volume 3: The Firmicutes, Springer, 455-460.
Positive results for phosphoamidase, pyrrolidonyl arylamidase, pyrazinamidase, ester lipase C8 and acid production from glucose.
Leucine aminopeptidase, pyrrolidonyl arylamidase and acid from mannitol are variable reactions.
Negative results for arginine dihydrolase, alkaline phosphatase, catalase, oxidase, alanine-phenylalanine-proline arylamidase,
N-acetyl-beta-glucosaminidase, chymotrypsin, alpha-fucosidase, alpha-galactosidase, beta-galactosidase, beta-glucuronidase,
glycyl-tryptophan arylamidase, lipase C14, beta-mannosidase, trypsin, urease, valine arylamidase, esculin, gelatin, hippurate, indole
and Voges-Proskauer reaction, acid production from: D-arabitol, L-arabinose, cyclodextrin, glycogen, lactose, maltose, melibiose,
melezitose, methyl-beta-D-glucopyranoside, pullulan, ribose, sorbitol, sucrose, trehalose and D-xylose.
Leucine aminopeptidase, pyrrolidonyl arylamidase and acid from mannitol are variable reactions.
Negative results for arginine dihydrolase, alkaline phosphatase, catalase, oxidase, alanine-phenylalanine-proline arylamidase,
N-acetyl-beta-glucosaminidase, chymotrypsin, alpha-fucosidase, alpha-galactosidase, beta-galactosidase, beta-glucuronidase,
glycyl-tryptophan arylamidase, lipase C14, beta-mannosidase, trypsin, urease, valine arylamidase, esculin, gelatin, hippurate, indole
and Voges-Proskauer reaction, acid production from: D-arabitol, L-arabinose, cyclodextrin, glycogen, lactose, maltose, melibiose,
melezitose, methyl-beta-D-glucopyranoside, pullulan, ribose, sorbitol, sucrose, trehalose and D-xylose.
(c) Costin Stoica
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