Riemerella columbina
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Bacteroidetes, Class Flavobacteriia, Order Flavobacteriales, Family Flavobacteriaceae, Genus Riemerella, Riemerella
columbina Vancanneyt et al. 1999.

Synonym: Riemerella anatipestifer-like.
Gram-negative, nonsporulating rods,  0.2-0.5 x 1-2.5 μm, occuring singly, in pairs, or
in short chains. Nonmotile.
Colonies are smooth, greyish-white to beige (Riemerella anatipestifer strains are
nonpigmented). Good growth when incubated aerobically at 37 ºC and
microaerobically at 24, 37 and 42 ºC on Columbia blood agar. No anaerobic growth.  
No growth on litmus lactose agar (variable features for
R. anatipestifer strains). No
growth on MacConkey agar. Variable haemolysis.
Isolated from the airsac, lung, palatine cleft, trachea and brain of pigeons.
Involved in respiratory infections, in pigeons, similar to those associated with Reimerella anatipestifer.
  1. M. Vancanneyt, P. Vandamme, P. Segers, U. Torck, R. Coopman, K. Kersters, and K.-H. Hinz. Riemerella columbina sp. nov., a
    bacterium associated with respiratory disease in pigeons. Int J Syst Bacteriol January 1999 49:289-295;
  2. Rubbenstroth D, Hotzel H, Knobloch J, Teske L, Rautenschlein S, Ryll M. Isolation and characterization of atypical Riemerella
    columbina strains from pigeons and their differentiation from Riemerella anatipestifer. Veterinary Microbiology , Volume 147 (1)
    Elsevier – Jan 10, 2011.
Positive results for esculin hydrolysis (negative for R. anatipestifer), chymotrypsin, catalase, oxidase, gelatin hydrolysis, camp , urease
& alpha-glucosidase.

Negative results for beta-galactosidase, nitrate reduction, indole production, acid production from D-glucose, maltose, D-mannose &
dextrin (variable reactions for
R. anatipestifer). Not using malonate as a carbon source. Not assimilated in the API 20NE system:
D-glucose, L-arabinose, D-mannose, D-mannitol, N-acetylglucosamine, maltose, D-gluconate, caprate, adipate, L-malate, citrate or
phenyl acetate.

Variable results for beta-glucosidase (negative for
R. anatipestifer), acid production from D-fructose & L-sorbose.
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