Isolated from the lungs, spleen, kidney and liver of diseased opossums with suppurative dermatitis and hepatic fibrosis.
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Taxonomy
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References
Firmicutes => Bacilli => Lactobacillales => Streptococcaceae => Streptococcus => Streptococcus didelphis Rurangirwa et al. 2000.
Gram-positive cocci, non-sporulated, non-motile, grouped in chains.
Colonies on 5% sheep blood Columbia agar are beta-haemolytic small and
translucent. Does not grow on MacConkey agar.
Growth temperature 37 °C. Facultatively anaerobic.
translucent. Does not grow on MacConkey agar.
Growth temperature 37 °C. Facultatively anaerobic.
Isolated from opossums (Didelphis virginiana).
- Fred R. Rurangirwa, Charlene A. Teitzel, Jing Cui, Dorothy M. French, Patrick L. McDonough and Thomas Besser:
Streptococcus didelphis sp. nov., a streptococcus with marked catalase activity isolated from opossums (Didelphis virginiana)
with suppurative dermatitis and liver fibrosis. IJSEM (2000), 50, 759–765.
(Tests were performed on API 20 Strep commercial kit with the exception of catalase)
Positive for catalase (unusual character for streptococci; lost after several subcultures),
hippurate hydrolysis, beta-glucuronidase, alkaline phosphatase, leucine arylamidase,
arginine dihydrolase, acid production from: ribose & trehalose.
Negative for acetoin production, beta-glucosidase; pydrrolidonyl arylamidase, alpha-galactosidase, beta-galactosidase, acid
production from: L-arabinose, mannitol, sorbitol, lactose, inulin, raffinose, glycogen & salicin.
Acid production from starch is variable.
Positive for catalase (unusual character for streptococci; lost after several subcultures),
hippurate hydrolysis, beta-glucuronidase, alkaline phosphatase, leucine arylamidase,
arginine dihydrolase, acid production from: ribose & trehalose.
Negative for acetoin production, beta-glucosidase; pydrrolidonyl arylamidase, alpha-galactosidase, beta-galactosidase, acid
production from: L-arabinose, mannitol, sorbitol, lactose, inulin, raffinose, glycogen & salicin.
Acid production from starch is variable.
(c) Costin Stoica
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