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Taxonomy
Morphology
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Pathogenicity
References
Firmicutes => Bacilli => Lactobacillales => Streptococcaceae => Streptococcus => Streptococcus adjacens Bouvet et al. 1989
Moved to Aerococcaceae => Abiotrophia => Abiotrophia adiacens (Bouvet et al. 1989) Kawamura et al. 1995
Synonym: Granulicatella adiacens (Bouvet et al. 1989) Collins and Lawson 2000.
Moved to Aerococcaceae => Abiotrophia => Abiotrophia adiacens (Bouvet et al. 1989) Kawamura et al. 1995
Synonym: Granulicatella adiacens (Bouvet et al. 1989) Collins and Lawson 2000.
0.4 - 0.6 μm, Gram positive chained cocci. (sometimes pleomorphic: cocci,
coccobacilli or rod-shaped cells).
coccobacilli or rod-shaped cells).
Small, 0.2 mm in diameter, alpha-haemolytic, colonies (after 48 hours incubation).
Aerobic & anaerobic growth, 37.0°C/ 48h, no growth at 10 or 45 °C.
Growth on complex media (Trypticase soy agar with defibrinated sheep blood; fresh
or enriched with 100 mg L-cysteine per liter or 10 mg of pyridoxal hydrochloride
per liter ). Grow dependent to a Staphylococcus epidermidis/aureus strain,
Streptocococcus or other species (satellitism).
Aerobic & anaerobic growth, 37.0°C/ 48h, no growth at 10 or 45 °C.
Growth on complex media (Trypticase soy agar with defibrinated sheep blood; fresh
or enriched with 100 mg L-cysteine per liter or 10 mg of pyridoxal hydrochloride
per liter ). Grow dependent to a Staphylococcus epidermidis/aureus strain,
Streptocococcus or other species (satellitism).
Isolated from oral cavity, intestine & urinary tract in humans. Rarely from animals.
Possible cause of endocarditis and bacteremia in humans. Rarely.
- Bergey’s Manual of Determinative Bacteriology, 9th ed., 1994.
- Bouvet A., Grimont F. & Grimont P.A.D.: Streptococcus defectivus sp. nov. and Streptococcus adjacens sp. nov., nutritionally
variant streptococci from human clinical specimens. Int. J. Syst. Bacteriol., 1989, 39, 290-294. - Kawamura Y., Hou X.G., Sultana F., Liu S., Yamamoto H. & Ezaki T.: Transfer of Streptococcus adjacens and Streptococcus
defectivus to Abiotrophia gen. nov. as Abiotrophia adiacens comb. nov. and Abiotrophia defectiva comb. nov., respectively. Int.
J. Syst. Bacteriol., 1995, 45, 798-803.
Alkaline phosphatase, Arginine, Hydrolysis of hippurate, Hydrolysis of esculin,
Voges-Proskauer, Alpha & beta-galactosidase, Catalase & oxidase negative.
Pyrrolidonearylamidase positive.
Acid from Ribose, Mannitol, Sorbitol, Lactose, Trehalose negative
Lactic acid is the predominant acid produced. Resistant to optochin and susceptible to
vancomycin.
Voges-Proskauer, Alpha & beta-galactosidase, Catalase & oxidase negative.
Pyrrolidonearylamidase positive.
Acid from Ribose, Mannitol, Sorbitol, Lactose, Trehalose negative
Lactic acid is the predominant acid produced. Resistant to optochin and susceptible to
vancomycin.
(c) Costin Stoica
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