Streptococcus plurextorum
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Firmicutes, Class Bacilli, Order Lactobacillales, Family Streptococcaceae, Genus Streptococcus, Streptococcus plurextorum  
Vela et al. 2009. Lancefield group B.
Gram-positive cocci, short chains.
Alpha-hemolytic colonies, round, 1 mm in diameter. Grow at 37.0 ºC, no growth at 10
or 45 ºC. No growth at pH 9.6 or in 6.5% NaCl medium.
Grows on complex media (Trypticase soy agar with defibrinated sheep blood).
Isolated from clinical samples from pigs.
Isolated from swine lungs and kidney (2 strains). May be a cause of pneumonia and septicemia.
  1. Vela A.I., Casamayor A., Sanchez del Rey V., Dominguez L. & Fernandez-Garayzabal J.F.: Streptococcus plurextorum sp. nov.,
    isolated from pigs. Int. J. Syst. Evol. Microbiol., 2009, 59, 504-508.
Description is based on API 50 CH and API Rapid ID 32 Strep tests results.

Positive results for alpha-galactosidase, beta-galactosidase, acid phosphatase,
leucine arylamidase, beta- glucuronidase,
alanine-phenylalanine-proline arylamidase,
glycyl-tryptophane arylamidase, acid production from: D-fructose, D-glucose, D-lactose,
maltose, raffinose, sacharose
, and trehalose.

Negative results for: arginine dihydrolase, hippurate, urease, acetoin production, phosphatase al
kaline,
N-acetyl-beta-glucosaminidase, alpha-glucosidase, alpha-mannosidase, alpha-fucosidase, esterase (C4), esterase lipase (C8),
lipase (C14), valine arylamidase, cystine arylamidase, trypsine, alpha-chymotrypsine, beta-glucosidase, beta-mannosidase,
pyroglutamic acid arylamidase, acid production from: 2-ketogluconate, amygdalin, arbutin, cellobiose, cyclodextrin, D-adonitol,
D-arabinose, D-arabitol, D-fucose, D-lyxose, D-mannitol, D-mannose, D-ribose, dulcitol, erythritol, esculin, gentiobiose, glycerol,
glycogen, inositol, inulin, L-arabinose, L-arabitol, L-fucose, L-rhamnose, L-sorbose, L-xylose, melezitose, melibiose, methyl
alpha-D-mannopyranoside, methyl beta-D-glucopyranoside, N-acetylglucosamine, pullulan, sorbitol, starch, tagatose, turanose,
and
xylitol.

Variable results for acid production from: D-galactose & D-xylose. 2-keto-gluconate,
and salicin reaction are delayed.
(c) Costin Stoica
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