Citrobacter Werkman and Gillen 1932 (Approved Lists 1980)
General information
Description and emendation
Gram-negative, non-sporulating, short rods with rounded ends. The V-P test is negative with glycerol. In the case of two cultures (Nos. 17 and 18) a faintly positive reaction is detectable with glucose after incubation at 30°C for five days. The citrate ion is used as the sole source of carbon. The urate ion is not used as the sole source of nitrogen or serves poorly. In the case of culture 8 the urate medium shows some growth. Nitrates are reduced to nitrites. Milk is not peptonized. Glycerol, mannitol, sorbitol, glucose, levulose, mannose, maltose, lactose, trehalose, xylose, rhamnose, and starch are dissimilated with the production of acid and gas. Erythritol, inulin and amygdalin are not dissimilated with the production of either acid or gas. Trimethylene glycol, lactic acid, acetic acid, formic acid, CO2, H2, ethyl alcohol and succinic acid produced from glycerol; 2,3-butylene-glycol, acetoin, and acetone not produced from glycerol. The methyl-red test does not prove satisfactory for the diferentiation of the genus because of the intermediate nature of the organisms. Their behavior is generally to produce a positive test but occasionally the results are not definite. The genus will be diagnosed with the purpose in mind of including the coli-aerogenes intermediates utilizing the citrate radical, methyl-red positive or weakly so and not producing acetoin from glycerol or glucose or in traces only from the later. The diagnosis will not be limited, for the present, to orgamsms producing trimethylene glycol although production of the glycol occurs with all the cultures so far examined.
Subdivision(s)
MID | Name | Rank | Taxon ID |
---|---|---|---|
M022506080204002 | Citrobacter amalonaticus | Species | 35703 |
M022506080204003 | Citrobacter braakii | Species | 57706 |
M022506080204004 | Citrobacter europaeus | Species | 1914243 |
M022506080204005 | Citrobacter farmeri | Species | 67824 |
M022506080204001 | Citrobacter freundii | Species | 546 |
M022506080204006 | Citrobacter gillenii | Species | 67828 |
M022506080204007 | Citrobacter koseri | Species | 545 |
M022506080204008 | Citrobacter murliniae | Species | 67829 |
M022506080204009 | Citrobacter pasteurii | Species | 1563222 |
M022506080204010 | Citrobacter portucalensis | Species | 1639133 |
M022506080204011 | Citrobacter rodentium | Species | 67825 |
M022506080204012 | Citrobacter sedlakii | Species | 67826 |
M022506080204013 | Citrobacter werkmanii | Species | 67827 |
M022506080204014 | Citrobacter youngae | Species | 133448 |