Riemerella (Moraxella) anatipestifer
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Bacteroidetes, Class Flavobacteriia, Order Flavobacteriales, Family Flavobacteriaceae, Genus Riemerella, Riemerella
anatipestifer
(Hendrickson and Hilbert 1932) Segers et al. 1993. Type species of the genus.

Basonym:
Moraxella anatipestifer (Hendrickson and Hilbert 1932) Bruner and Fabricant 1954.
Old synonyms:
Pfeifferella anatipestifer Hendrickson and Hilbert 1932, Pasteurella anapestifer Hauduroy et al. 1953, Pasteurella
anatipestifer (Hendrickson and Hilbert 1932) Merchant 1957.
Gram-negative, non-sporulating rods, 0.3-0.5 x 1-2.5 μm, occuring singly, in pairs, or
in short chains. Nonmotile.
Smooth, non-pigmented colonies are developed within 2 days during microaerobic
incubation on rich peptone, peptone-blood, or chocolate agar at 36 ºC. Haemolysis is
variable. Optimal growth occurs at 37 ºC. Can grow at 45 ºC, but not at 4 ºC. Requires
thiamine, but low concentrations of pyrithiamine and amprolium are inhibitory.
Growth occurs in Huddleson’s thionine medium, in Huddleson’s basic fuchsin
medium, and on agar containing 10% bile in serum. No growth occurs on agar
containing 40% bile in serum, citrate agar, or MacConkey agar or in KCN broth or
glycerol phosphate medium.
Isolated from ducks, geese, turkeys, and waterfowl with septicemic disease. Also isolated from muscovy ducks, chickens, pheasants,
quails, and wild free-living waterfowl.
Bacterium is the causative agent of "septicemia anserum exsudativa" a septicemic disease in ducks and other birds.
  1. P. Segers, W. Mannheim, M. Vancanneyt, K. De Brandt, K.-H. Hinz, K. Kersters, and P. Vandamme. Riemerella anatipestifer gen.
    nov., comb. nov., the Causative Agent of Septicemia Anserum Exsudativa, and Its Phylogenetic Affiliation within the
    Flavobacterium-Cytophaga rRNA Homology Group. Int J Syst Bacteriol October 1993 43:768-776.
  2. 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; doi:10.1099/00207713-
    49-1-289.
Positive results for gelatin liquefaction (most strains), oxidase, catalase, alkaline and acid phosphatase, ester lipase C8, Ieucine
arylamidase, valine arylamidase, cystine arylamidase, phosphoamidase, alpha-glucosidase & esterase C4.

Negative results for nitrates reduction, indole production, H
2S production, alpha- and beta-galactosidase, beta-glucuronidase,
beta-glucosidase, alpha-mannosidase, beta-glucosaminidase, lipase C14, fucosidase, trypsin, ornithine decarboxylase, lysine
decarboxylase, phenylalanine deaminase.
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 urease & litmus milk reaction.
(c) Costin Stoica
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