SUMMARY: The cultural and biochemical characteristics of 38 strains of are described. They are non-sporing aerobic Gram-negative rods which produce a violet pigment and possess both polar monotrichous and peritrichous flagella. They produce little acidity from carbohydrates and utilize citrate.

Two main groups of strains were distinguishable, a mesophilic and a psychrophilic group. The former usually ferment glucose anaerobically, are markedly proteolytic, facultatively anaerobic, and give a positive egg-yolk reaction, but do not hydrolyse aesculin. The psychrophilic organisms produce acid from glucose but only aerobically, are poorly proteolytic, strictly aerobic, and hydrolyse aesculin but do not produce an egg-yolk reaction.

Grimes, Davis and Gilman have been re-examined; they should be excluded from the genus. The nomenclature of the genus is confused. Proposals have therefore been made to the International Committee on Bacteriological Nomenclature that the mesophilic species should be called and the psychrophilic species , and neotype strains have been suggested.


Article metrics loading...

Loading full text...

Full text loading...


Most cited this month Most Cited RSS feed

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error