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A family of nonmotile, nonsporeforming, anaerobic bacteria (order Eubacteriales) containing gram-negative (with a tendency to resist decolorization) cocci that vary in diameter from small (0.3-0.5 mcm) to large (2.5 mcm). Characteristically, they occur in pairs; single cells, masses, or chains may also occur, but the chains may show gaps illustrating the basic diplococcal arrangement. These organisms are chemoorganotrophic; they may or may not ferment carbohydrates; they are parasites of homothermic animals such as humans, ruminants, rodents, and pigs, and are primarily found in the alimentary tract. The type genus is Veillonella.
Farlex Partner Medical Dictionary © Farlex 2012


Adrien, French bacteriologist, 1864-1931.
Veillonella - a genus of nonmotile, non--spore-forming, anaerobic bacteria.
subsp.Veillonella alcalescensalcalescens - a bacterial subspecies found primarily in the mouths of humans but occasionally in the buccal cavity of rabbits and rats.
subsp.Veillonella alcalescensdispar - a subspecies found in the mouths and respiratory tracts of humans.
Veillonella atypica - Synonym(s): Veillonella parvula subsp. atypica
Veillonella parvula - a bacterial species found normally as a harmless parasite in the natural cavities, especially the mouths and digestive tracts of humans and other animals.
subsp.Veillonella parvulaatypia - a bacterial subspecies found in the buccal cavity of rats and humans. Synonym(s): Veillonella atypica
subsp.Veillonella parvulaparvula - a bacterial subspecies found in the mouth, or intestinal or respiratory tract of humans.
subsp.Veillonella parvularodentium - a bacterial subspecies found in the buccal cavity and intestinal tract of hamsters, rats, and rabbits. Synonym(s): Veillonella rodentium
Veillonella rodentium - Synonym(s): Veillonella parvula subsp. rodentium
Veillonellaceae - a family of nonmotile, non--spore-forming, anaerobic bacteria containing gram-negative cocci.
Medical Eponyms © Farlex 2012
References in periodicals archive ?
* arrow] Bacilli class: [up Prevotellaceae was arrow] Streptococcaceae enriched in alcoholic family: Clostridia class: cirrhosis patients when [up arrow] Veillonellaceae compared with HBV and [down arrow] cirrhosis patients and Lachrtospiraceae family healthy controls.
Kang ASD higher than CON: none 2013 [28] CON higher than ASD: Genus: Prevotella, Coprococcus, and unclassified Veillonellaceae Other findings: Autism and accompanying gastrointestinal symptoms were characterized by distinct and less diverse gut microbial compositions.
nov., a novel member of the family Veillonellaceae. Int J Syst Evol Microbiol.
Regardless of which gastro intestinal sections they occurred in, the 11 families, including Lachnospiraceae (7.1% to 37.5%), Ruminococcaceae (7.2% to 28.4%), Prevotellaceae (2.2% to 40.1%), Veillonellaceae (0.5% to 11.0%), S24-7 (a member of Bacteroidales) (0.7% to 11.0%), Paraprevotellaceae (0.3% to 6.8%), Clostridiaceae (1.4% to 8.5%), Succinivibrionaceae (0.2% to 3.4%), RFP12 (a member of WCHBl-41) (0.1% to 13.8%), Bifidobacteriaceae (0.1% to 4.9%), and Porphyromonadaceae (0.1% to 3.0%) were defined as the core families, because they were found in all gastrointestinal tract sections of sheep.
Regardless of which gastrointestinal sections they occurred in, the 15 genera, including Prevotella (2.2% to 40.2%), unclassified Lachnospiraceae (3.5% to 15.3%), Ruminococcus (2.0% to 14.2%), unclassified Ruminococcaceae (3.0% to 12.5%), unclassified S24-7 (0.7% to 11.0%), CF231 (a member of Paraprevotellaceae) (0.2% to 4.9%), unclassified RFP12 (0.1% to 13.8%), unclassified Clostridiaceae (0.4% to 6.1%), unclassified Bifidobacteriaceae (0.1% to 3.6%), Clostridium (0.1% to 2.3%), Oscillospira (0.1% to 3.2%), unclassified Veillonellaceae (0.1% to 4.1%), Succinivibrio (0.2% to 2.5%), Anaerovibrio (0.1% to 2.2%), and Coprococcus (0.2% to 1.9%) were defined as the core genera, because they were found in all gastrointestinal tract sections of sheep.