| Listeria (Jonesia) denitrificans |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Firmicutes, Class Bacilli, Order Bacillales, Family Listeriaceae, Genus Listeria, Listeria denitrificans Prevot 1961.
Moved to genus Jonesia as Jonesia denitrificans (Prevot 1961) Rocourt et al. 1987.
Species description is based on a single isolate.
Moved to genus Jonesia as Jonesia denitrificans (Prevot 1961) Rocourt et al. 1987.
Species description is based on a single isolate.
Gram positive (ready decolorized in older cultures), irregular rods, 0.3 x 0.5 um,
showing branched Y- and clublike forms. Filamentous and coccoid cells may also
occur in older cultures. Motile. Non-spore-forming.
showing branched Y- and clublike forms. Filamentous and coccoid cells may also
occur in older cultures. Motile. Non-spore-forming.
Colonies on nutrient agar are 0.5 to 1.5 mm in diameter (24 to 48 h), convex, smooth,
grayish, and translucid to opaque, becoming yellowish in 10 to 20 days. Grows at
15-30 ºC, but not at 4 or 45 ºC. Grows at pH 5.8-7.8. Grows in 1.0, 5.0 and 7.5% NaCl.
Facultatively anaerobic.
grayish, and translucid to opaque, becoming yellowish in 10 to 20 days. Grows at
15-30 ºC, but not at 4 or 45 ºC. Grows at pH 5.8-7.8. Grows in 1.0, 5.0 and 7.5% NaCl.
Facultatively anaerobic.
Isolated from cooked ox blood.
Resistant to carbenicillin, cephaloridine, D-cycloserine, and kanamycin. Variable resistance to oxytetracycline and oxolinic acid.
Sensitive to novobiocin. Can grow on on methylene blue (0.01%;, w/v), phenol (0.1 and 0.15%, w/v), potassium thiocyanate (3.75%,
w/v) and thallous acetate (0.025%, w/v).
Resistant to carbenicillin, cephaloridine, D-cycloserine, and kanamycin. Variable resistance to oxytetracycline and oxolinic acid.
Sensitive to novobiocin. Can grow on on methylene blue (0.01%;, w/v), phenol (0.1 and 0.15%, w/v), potassium thiocyanate (3.75%,
w/v) and thallous acetate (0.025%, w/v).
Undeteremined.
- Rocourt J, Wehmeyer U, Stackebrandt E. Transfer of Listeria denitrificans to a new genus, Jonesia gen. nov., as Jonesia
denitrificans comb. nov. Int. J. Syst. Bacteriol. 1987; 37:266-270. - Goodfellow, M., T.M. Embley and B. Austin. 1985. Numerical taxonomy and emended description of Renibacterium salmoninarum.
J. Gen. Microbiol. 131: 2739-2752.
Positive results for catalase, casein hydrolysis, chitinase, DNase, esterase C8, esculin hydrolysis, alpha- and beta-glucosidase,
alpha- and beta-galactosidase, N-acetyl-beta-glucosaminidase, leucine arylamidase, phosphoamidase, and starch hydrolysis.
Negative results for acid and alkaline phosphatase, chymotrypsinase, cystine arylamidase, esterase C4, alpha-fucosidase,
beta-glucuronidase, lipase, alpha-mannosidase, oxidase (positive in Goodfellow's study), trypsinase, Tween 80 hydrolysis, and
valine arylamidase.
alpha- and beta-galactosidase, N-acetyl-beta-glucosaminidase, leucine arylamidase, phosphoamidase, and starch hydrolysis.
Negative results for acid and alkaline phosphatase, chymotrypsinase, cystine arylamidase, esterase C4, alpha-fucosidase,
beta-glucuronidase, lipase, alpha-mannosidase, oxidase (positive in Goodfellow's study), trypsinase, Tween 80 hydrolysis, and
valine arylamidase.
(c) Costin Stoica
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