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Taxonomy
Morphology
Growth conditions
Biochemical characters
Ecology
Pathogenicity
References
Bacteria => Firmicutes => Bacilli => Bacillales => Planococcaceae => Lysinibacillus => Lysinibacillus sphaericus (Neide 1904)
Ahmed et al. 2007
Historical synonyms: Bacillus sphaericus Neide (1904), B. lactimorbi Jordan and Harris (1908), B. loehnisii Gibson (1935b), B.
rotans Roberts (1935), B. sphaericus var. rotans Smith, Gordon and Clarck (1946), B. serositidis Lacorte (1932).
Ahmed et al. 2007
Historical synonyms: Bacillus sphaericus Neide (1904), B. lactimorbi Jordan and Harris (1908), B. loehnisii Gibson (1935b), B.
rotans Roberts (1935), B. sphaericus var. rotans Smith, Gordon and Clarck (1946), B. serositidis Lacorte (1932).
1.4-2.7 / 0.4-0.9 µm, Gram-positive or Gram-variable, motile, with fairly abundant peritrichous flagella or only polar flagella that
coalesced in a long ribbon; non-haemolytic.
Spores: generally round , subterminal or terminal, swelling the sporangia.
coalesced in a long ribbon; non-haemolytic.
Spores: generally round , subterminal or terminal, swelling the sporangia.
Growth on nutrient agar varies in different strains from compact and heaped to a wide
spreading over the surface; uncommon strains produce pink colonies.
Maximum temperature, 30-45 ºC; minimum temperature, 5-15 ºC.
Aerobic.
Growth in 5% NaCl.
Growth at 5.7 pH is a variable property.
spreading over the surface; uncommon strains produce pink colonies.
Maximum temperature, 30-45 ºC; minimum temperature, 5-15 ºC.
Aerobic.
Growth in 5% NaCl.
Growth at 5.7 pH is a variable property.
Spores occur in soil; found in food and water.
Is an accidental human pathogen; may be involved in bacteremia, meningitis, pseudotumors, food infections.
- Gordon R.E., Haynes W.C., Pang C.H. (1973) – The genus Bacillus . Agriculture Handbook No. 427, U.S.D.A., Washington D.C.
- Buchanan R.E., Gibbons N.E., Cowan S.T., Holt J.G., Liston J., Murray R.G.E., Niven C.F., Ravin A.W., Stanier R.W. ( 1974) –
Bergey’s Manual of Determinative Bacteriology, Eight Edition, The Williams & Wilkins Company, Baltimore. - Buiuc D., Negut M. , 1999. Tratat de Microbiologie Clinica, Editura Medicala, Bucuresti.
Catalase +
Acid from glucose – , mannitol – ,arabinose – , xilose –
Starch hydrolysis –
Reduction of nitrate to nitrite –
Decomposition of casein variable
Voges-Proskauer –
Resistance to lysozyme variable
Use of citrate variable
Indole –
Gelatin liquefaction +
Acid from glucose – , mannitol – ,arabinose – , xilose –
Starch hydrolysis –
Reduction of nitrate to nitrite –
Decomposition of casein variable
Voges-Proskauer –
Resistance to lysozyme variable
Use of citrate variable
Indole –
Gelatin liquefaction +
(c) Costin Stoica
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