| Allocoenonia anatina |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Pseudomonadota (Proteobacteria), Class Flavobacteriia, Order Flavobacteriales, Family Flavobacteriaceae, Genus
Coenonia, Allocoenonia anatina (Vandamme et al. 1999) Oren and Molinari Novoa 2024, type species of the genus.
Synonyms: Riemerella anatipestifer – like Taxon 1502 Hinz et al., 1998, Coenonia anatina Vandamme, Vancanneyt, Segers, Ryll,
Kohler, Ludwig and Hinz, 1999.
Coenonia, Allocoenonia anatina (Vandamme et al. 1999) Oren and Molinari Novoa 2024, type species of the genus.
Synonyms: Riemerella anatipestifer – like Taxon 1502 Hinz et al., 1998, Coenonia anatina Vandamme, Vancanneyt, Segers, Ryll,
Kohler, Ludwig and Hinz, 1999.
Gram-negative rods, 0.2-0.4/1.2-2.5 µm; some cells are spherically swollen, spindle-
or lemon shaped and arranged in short chains. Nonmotile. Non-spore-forming.
or lemon shaped and arranged in short chains. Nonmotile. Non-spore-forming.
Colonies are smooth, non-pigmented to whitish, flat-convex after 16-24 h of
incubation on 7% sheep blood Columbia agar under micro-aerophilic conditions
(3-5% CO2) at 37 ºC. Grows on conventional media. Non-haemolytic. Grows at: 36-37
ºC, optimum. No growth in aerobic conditions. Grows well in microaerobic conditions.
Growth is weak in anaerobic conditions. No growth on MacConkey agar.
incubation on 7% sheep blood Columbia agar under micro-aerophilic conditions
(3-5% CO2) at 37 ºC. Grows on conventional media. Non-haemolytic. Grows at: 36-37
ºC, optimum. No growth in aerobic conditions. Grows well in microaerobic conditions.
Growth is weak in anaerobic conditions. No growth on MacConkey agar.
Isolated from respiratory tract (lungs, airsac, pericard) and brain of ducks and geese, in association with signs similar to those of
Riemerella anatipestifer-associated exsudative septicaemia.
Riemerella anatipestifer-associated exsudative septicaemia.
Associated with respiratory disease in ducks and geese, similar to Riemerella anatipestifer-associated exsudative septicaemia.
- Vandamme P, Vancanneyt M, Segers P, Ryll M, Köhler B, Ludwig W and Hinz KH, 1999. Coenonia anatina gen. nov., sp. nov., a
novel bacterium associated with respiratory disease in ducks and geese. Int J Syst Bact 49, 867-874. - Oren A, Molinari Novoa EA. Proposal of Allocatenococcus gen. nov., Allocoenonia gen. nov. and Allofournierella gen. nov. as
replacement names for the illegitimate prokaryotic generic names Catenococcus Sorokin 1994, Coenonia Vandamme et al. 1999
and Fournierella Togo et al. 2017, respectively. Int J Syst Evol Microbiol 2024; 74:6547.
Description is based mostly on API results: API ZYM, API 20NE, ID-32E.
Positive results for acid and alkaline phosphatase, catalase, chondroitin sulfatase, cystine arylamidase, esterase C4, esterase
lipase C8, alpha-fucosidase, alpha-glucosidase, hyaluronidase, leucine arylamidase, N-acetyl-beta-glucosaminidase, oxidase,
trypsin, valine arylamidase, Voges-Proskauer test, acid production from: dextrin, D-fructose, D-glucose, D-galactose, lactose,
N-acetylglucosamine, maltose, and D-mannose.
Negative results for arginine dihydrolase, citrate Simmons, chymotrypsin, beta-glucuronidase, indole production, lysine
decarboxylase, lipase C14, methyl red, alpha-mannosidase, nitrate reduction, ornithine decarboxylase, phenylalanine deaminase,
urease, acid production from: adonitol, L-arabinose, D-arabitol, cellobiose, dulcitol, inositol, 5-ketogluconate, D-mannitol, rhamnose,
saccharose, salicin, sorbose, D-sorbitol, trehalose, and D-xylose.
Variable results for aesculin hydrolysis, gelatinase, alpha-galactosidase beta-galactosidase and beta-glucosidase.
Positive results for acid and alkaline phosphatase, catalase, chondroitin sulfatase, cystine arylamidase, esterase C4, esterase
lipase C8, alpha-fucosidase, alpha-glucosidase, hyaluronidase, leucine arylamidase, N-acetyl-beta-glucosaminidase, oxidase,
trypsin, valine arylamidase, Voges-Proskauer test, acid production from: dextrin, D-fructose, D-glucose, D-galactose, lactose,
N-acetylglucosamine, maltose, and D-mannose.
Negative results for arginine dihydrolase, citrate Simmons, chymotrypsin, beta-glucuronidase, indole production, lysine
decarboxylase, lipase C14, methyl red, alpha-mannosidase, nitrate reduction, ornithine decarboxylase, phenylalanine deaminase,
urease, acid production from: adonitol, L-arabinose, D-arabitol, cellobiose, dulcitol, inositol, 5-ketogluconate, D-mannitol, rhamnose,
saccharose, salicin, sorbose, D-sorbitol, trehalose, and D-xylose.
Variable results for aesculin hydrolysis, gelatinase, alpha-galactosidase beta-galactosidase and beta-glucosidase.
(c) Costin Stoica
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