Cross Index Obesumbacterium proteus
SuperSet Prokaryote, Eubacteria Facultatively Anaerobic Gram-Negative Rods Enterobacteriaceae
Compare Enterobacteriaceae, Arsenophonus nasoniae, Buttiauxella agrestis, Cedecea, Citrobacter, Edwardsiella, Enterobacter, Erwinia, Escherichia, Ewingella americana, Hafnia alvei, Klebsiella, Kluyvera, Leclercia adecarboxylata, Leminorella, Moellerella wisconsensis, Morganella morganii, Obesumbacterium proteus, Pantoea, Pragia fontium Proteus, Providencia, Rahnella aquatilis, Salmonella, Serratia, Shigella, Tatumella plyseos, Xenorhabdus, Yersina, Yohenella regensburgei

Vibrionacae, Aeromonas, Enhydrobacter aerosaccus, Photobacterium, Plesiomonas shigelloides, Vibrio

Pasteurellaceae, Actinobacillus, Hemophilus, Pasteurella

Calymmatobacterium granulomatis, Cardiobacterium hominis, Chromobacterium, Eikenella corrodens, Gardnerella vaginalis, Streptobacillus moniliformis, Zymomonas

Contrast Archaea


Morphology Obesumbacterium proteus
Staining Gram negative
Morphology Pleomorphic rods 0.8-2.0 um in diameter, 1.5-100 um in length (short, "fat" rods predominate when grown in beer wort with live yeasts, long pleomorphic rods usually predominate when grown in most bacteriological media),
Motility Nonmotile
Specialized structures  
Solid surface Very slow growing, forming colonies less than 0.5 mm in diameter on ordinary plating media at 24 h.


Growth Parameters Obesumbacterium proteus
Oxygen Facultatively anaerobic
Temperature Optimum temperature, 32`C
Products Acid formed from D-glucose and D-mannose; very few other carbohydrates are fermented. Gas formation during fermentation is variable (original description says gas is produced, but none of the strains studied produced gas). Nitrate is reduced to nitrite. Many biochemical tests normally used for differentiation of Enterobacteriaceae are negative or delayed
Enzymes Lysine decarboxylase is positive.
Unique features  
Habitat Occurs as a brewery contaminant which can survive and grow in the presence of live yeasts during beer production.


Genome Obesumbacterium proteus
G+C Mol % 48-49 (Bd)
  O. proteus, has two defined biogroups (1 and 2).that are really distinct species which are phenotypically different and only distantly related by DNA/DNA hybridization.


Reference Obesumbacterium proteus
First citation Shimwell, J.L.(1963) Obesumbacterium gen. nov. Brewers.J. 99:759-760
The Prokaryotes p
Bergey's Systematatic p 506 J.J. Farmer
Bergey's Determinative p 183