Cross Index Capnocytophaga
SuperSet Prokaryote, Eubacteria Gliding Bacteria
Compare Cytophagales, Beggiatoales

Single Celled, rod shaped Capnocytophaga, Chitinophaga pinensis , Cytophaga, Flexibacter, Flexithrix dorotheae, Lysobacter, Microscilla, Sporocytophaga myxococcoides, Thermomena,
Flattened, filamentous Gliding: Alysiella filiformis, Simonsiella,
Sulfur oxidizing,Gliding: Achromatium, Beggiatoa alba, Thioploca, Thiospirillopsis floridana, Thiothrix nivea,
The Pelonemas: Achroanema spp, Desmanthos thiorenophilum, Pelenema, Peloploca,
Other Genera: Agitococcus lubricus , Desulfonema Herpetosiphon, Isosphaera pallida, Leucothrix mucor, Saprospira, Toxothrix trichogenes,Vitreoscilla

Contrast Archaea


Morphology Capnocytophaga
Staining Gram-negative
Morphology Short to elongate flexible rods or filaments, 0.42-0.6 um in diameter and 2.5-5.7 um in length. Ends of cells usually round to tapered. Cells can be pleomorphic
Motility No flagella; motile by gliding.
Specialized structures Capsules and sheaths not formed. Resting stages not known
Solid surface  


Growth Parameters Capnocytophaga
Tropism Chemoorganotrophic,
Oxygen Facultative anaerobic Growth occurs in air with 5% CO2 Some strains are reported to grow aerobically without CO2. fermentative type metabolism
Temperature Optimum temperature: 35-37`C
Requirements Primary isolation and initial in-vitro growth require CO2 This organism utilizes variable carbohydrates as fermentable substrates and energy source
Products Fermentation of glucose yields chiefly acetate and succinate as major acidic end products; trace amounts of isovalerate. Polysaccharides such as dextran, glycogen, inulin, or starch may be fermented
Enzymes Catalase- and oxidase-negative, o- nitrophenyl-B-D-galactoside (ONPG), and benzidine-positive.
Unique features  
Habitat Found in association with animal and human hosts
Pathogenicity Although the pathogenicity of these organisms is unknown, they are frequent isolates from oral sites and are also recovered from pulmonary lesions and abscesses, as well as from healthy oral and nonoral sites in their hosts


Genome Capnocytophaga
G+C Mol % 33-41 (Tm)


Reference Capnocytophaga
First citation Leadbetter,E.R., S.C. Holt and S.S. Socransky. 1979. Capnocytophaga: new genus of Gram-negative bacteria I. General characteristics, taxonomic considerations and significance. Arch. Microbiol 122:9-16
The Prokaryotes  
Bergey's Systematatic p 2050 S. C. Holt and S.A. Kinder
Bergey's Determinative p 486