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Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Firmicutes => Bacilli => Lactobacillales => Streptococcaceae => Streptococcus => Streptococcus equinus Andrewes and Horder 1906.
Synonym: Streptococcus bovis Orla-Jensen 1919. Poyart et al. 2002 proposed to designate Streptococcus bovis (later heterotypic
synonym) as Streptococcus equinus.
Lancefield group D.
Synonym: Streptococcus bovis Orla-Jensen 1919. Poyart et al. 2002 proposed to designate Streptococcus bovis (later heterotypic
synonym) as Streptococcus equinus.
Lancefield group D.
Gram positive cocci, non-motile, grouped in moderately long chains.
Small, alpha-hemolytic, non-pigmented colonies.Growth at 37 °C (no growth at 10 °C).
Aerobic, facultatively anaerobic. Growth on complex media:
Trypticase soy agar with defibrinated sheep blood.
L-asparagine enriched medium.
Aerobic, facultatively anaerobic. Growth on complex media:
Trypticase soy agar with defibrinated sheep blood.
L-asparagine enriched medium.
Isolated from the intestinal tract of humans & animals (horse, cows, sheep).
Unknown (none). Possible cause of human endocarditis, meningitis or septicemia (rarely).
In bovines proliferation of S. bovis in the rumen is enhanced by the high quantities fermentable carbohydrates diet. Lactic acid in
excess may lead to ruminal acidosis.
In bovines proliferation of S. bovis in the rumen is enhanced by the high quantities fermentable carbohydrates diet. Lactic acid in
excess may lead to ruminal acidosis.
- Bergey’s Manual of Determinative Bacteriology, 9th ed., 1994.
- Orla-Jensen S. (ed.): The lactic acid bacteria. Host, Copenhagen, 1919, pp. 1-196.
- Poyart C., Quesne G. & Trieu-Cuot P.: Taxonomic dissection of the Streptococcus bovis group by analysis of manganese-
dependent superoxide dismutase gene (sodA) sequences: reclassification of 'Streptococcus infantarius subsp. coli' as
Streptococcus lutetiensis sp. nov. and of Streptococcus bovis biotype II.2 as Streptococcus pasteurianus sp. nov. Int. J. Syst.
Evol. Microbiol., 2002, 52, 1247-1255. - Skerman VB et al. Approved lists of bacterial names. Int. J. Syst. Bacteriol. 30: 225-420, 1980.
- "Subacute Ruminal Acidosis". The Merck Veterinary Manual.
Lactic acid bacteria.
Common characters (S. equinus & bovis): Acid produced from glucose, fructose,
galactose, maltose, sucrose. Hydrolysis of esculin, Voges-Proskauer - positive
Alkaline phosphatase(PAL), arginine (ADH), ribose - negative
Differences (if considering 2 different species):
S. equinus: mannitol, sorbitol, lactose - negative. Inulin, raffinose, salicin - variable
S. bovis: lactose, raffinose, salicin - positive. Mannitol, sorbitol, trehalose, inulin - variable
Common characters (S. equinus & bovis): Acid produced from glucose, fructose,
galactose, maltose, sucrose. Hydrolysis of esculin, Voges-Proskauer - positive
Alkaline phosphatase(PAL), arginine (ADH), ribose - negative
Differences (if considering 2 different species):
S. equinus: mannitol, sorbitol, lactose - negative. Inulin, raffinose, salicin - variable
S. bovis: lactose, raffinose, salicin - positive. Mannitol, sorbitol, trehalose, inulin - variable
(c) Costin Stoica
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