Morphology | Janthinobacterium lividum |
CELLULAR |
Staining | Gram-negative, occasionally with barred or bipolar staining and lipid inclusions. |
Morphology | Rods 0.8-1.2 x 2.5-6.0 um with rounded ends, sometimes slightly curved. Occur singly, occasionally with some pairs or short chains. Definite capsules are not evident, although sometimes intercellular slime is formed. |
Motility | Motile by means of both a single polar flagellum and usually one to four subpolar or lateral flagella. |
Specialized structures | No resting stages are known. |
Division |
COLONIAL |
Solid surface | Produce low convex, round, violet colonies. |
Liquid | in nutrient broth, a violet ring is formed at the junction of the liquid surface and the container wall |
Growth Parameters | Janthinobacterium lividum |
PHYSIOLOGICAL |
Tropism | Chemoorganotrophs Grow on ordinary peptone media. Utilize citrate and ammonia as sole carbon and nitrogen sources for growth and grow rapidly. |
Oxygen | Strict aerobes having a strictly respiratory type of metabolism with oxygen as the terminal electron acceptor. |
pH | Optimum pH, 7-8; no growth below pH 5. |
Temperature | Optimum , 25`C; minimum, 2`C; maximum, 32`C. |
Requirements | Growth factors are not required. No growth occurs in media containing 6% or more of NaCl |
Products | Acid but no gas is produced from glucose and certain other carbohydrates. Lactate is oxidized to CO2. Indole-negative. Voges-Proskauer-negative. Nitrate and nitrite are reduced, sometimes with visible gas production. Ammonia is formed from peptone |
Enzymes | Usually oxidase- ositive by the method of Kovacs (1956), although the violet pigment may interfere with the reading. Catalase-positive. Phosphatase-positive. Arylsulfatase negative |
Unique features | Resistant to benzylpenicillin (10 ug/ml) and to vibriostatic agent 0/129 (2,4-diamino-6,7-diisopropylpteridine, 30 ug/disc). |
ENVIRONMENTAL |
Habitat | Soil and water organisms, common in temperate climates. |
Lifestyle | |
Pathogenicity | Occasionally cause food spoilage. |
Distribution |
Genome | Janthinobacterium lividum |
G+C Mol % | 61-67 |
Reference | Janthinobacterium lividum |
First citation | De Ley J., P. Segers and M. Gillis (1978) Intra- and intergeneric similariliites of Chromobacterium and Janthinobacterium ribosomal ribonucleic acid cistrons. IJSB 28:154-168 |
The Prokaryotes | p |
Bergey's Systematatic | p 376 P.H.A. Sneath |
Bergey's Determinative | p 85 |
References |