Arcobacter pacificus
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Pseudomonadota (Proteobacteria), Class Epsilonproteobacteria, Order Campylobacterales, Family Arcobacteraceae, Genus
Arcobacter,
Arcobacter pacificus Zhang et al. 2016.

Species description is based on a single isolate.
Synonym:
Malaciobacter pacificus corrig. (Zhang et al. 2016) Perez-Cataluna et al. 2020.
Gram-negative, slightly curved rods, 0.3-0.5 x 1.0-3.6 μm. Motile by a single polar
flagellum. Non-spore-forming. Non-encapsulated.
Colonies on MA incubated under aerobic conditions at 37 ºC for 48 h are pale yellow,
circular with entire margins, convex and non-swarming. Pigments are not produced.
Growth occurs in the presence of 0.5-9% (w/v) NaCl (optimum 2-4 %). Grows on MA at
0-45 ºC (optimum 37 ºC) and at pH 7.0-11.0 (optimum pH 10.0). Cells grow well
under both aerobic and microaerobic conditions with no significant differences at 30,
37 and 42 ºC on MA. Weak growth is obtained in anaerobic conditions at 37 ºC and
in aerobic conditions at 45 ºC. Under aerobic conditions, grows at 37 ºC on media
containing 64 mg cefoperazone / l and media containing 0.5-4.0% (w/v) NaCl. No
growth on minimal medium or MacConkey agar.
Isolated from surface seawater of the South Pacific Gyre during the Integrated Ocean Drilling Program Expedition 329.
Undetermined.
  1. Zhang Z, Yu C, Wang X, Yu S, Zhang XH. Arcobacter pacificus sp. nov., isolated from seawater of the South Pacific Gyre. Int J Syst
    Evol Microbiol 2016; 66:542-547.
Positive results for alkaline phosphatase, arginine dihydrolase, catalase, aesculin hydrolysis, esterase (C4), esterase
lipase (C8), leucine arylamidase, beta-galactosidase, alpha-glucosidase, gelatinase, indoxyl acetate hydrolysis, nitrate reduction,
N-acetyl-beta-glucosaminidase, naphtholAS-BI-phosphohydrolase, pyruvate utilization, starch hydrolysis, valine arylamidase and
acid  production from: glycerol, D-glucose, D-ribose, aesculin, maltose, melibiose, sucrose, trehalose, raffinose, starch and turanose.
Can utilize (Biolog GN2): dextrin, glycogen, L-arabinose, D-fructose, D-galactose, alpha-D-glucose, maltose, melibiose, trehalose,
monomethyl succinate, acetic acid, D-gluconic acid, gamma-hydroxybutyric acid, alpha-ketobutyric, acid, alpha-ketoglutaric acid,
propionic acid, succinic acid, L-alaninamide, D- andL-alanine, L-alanylglycine, L-ornithine, L-phenylalanine, L-proline, DL-carnitine,
gamma-aminobutyric acid, 2,3-butanediol, glycerol, alpha-DL-glycerol phosphate, glucose 1-phosphate and glucose 6-phosphate.

Negative results for casein hydrolysis, citrate utilization, cystine arylamidase, aesculin hydrolysis, esterase, beta-fucosidase,  
alpha-galactosidase, beta-glucuronidase, beta-glucosidase H
2S production, hippurate hydrolysis, lecithinase, lipase (C14), oxidase,  
ornithine decarboxylase, alpha-mannosidase, trypsin, alpha-chymotrypsin and  urease.
No utilization of: alpha-cyclodextrin, Tween 40 and 80, N-acetyl-D-galactosamine, N-acetyl-D-glucosamine, adonitol, D-arabitol,
cellobiose, i-erythritol, L-fucose, gentiobiose, myo-inositol, alpha-lactose, lactulose, D-mannitol, D-mannose, methyl
beta-D-glucoside, D-psicose, raffinose, L-rhamnose, D-sorbitol, sucrose, turanose, xylitol, pyruvic acid methyl ester, cis-aconitic acid,
citric acid, formic acid, D-galactonic acid lactone, D-galacturonic acid, D-glucosaminic acid, D-glucuronic acid, alpha- and
beta-hydroxybutyric acid, p-hydroxyphenlyacetic acid, itaconic acid, alpha-ketovaleric acid, DL-lactic acid, malonic acid, quinic acid,
D-saccharic acid, sebacic acid, bromosuccinic acid, succinamic acid, glucuronamide, L-asparagine, L-aspartic acid, L-glutamic acid,
glycyl L-aspartic acid, glycyl L-glutamic acid, L-histidine, hydroxy-L-proline, L-leucine, L-pyroglutamic acid, D- and L-serine,
L-threonine, urocanic acid, inosine, uridine, thymidine, phenylethylamine, putrescine and 2-aminoethanol.
(c) Costin Stoica
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