| Rivicola pingtungensis |
Colonies are cream, convex and circular with irregular, curled margins. Colony size is
approximately 0.7-1.2 mm in diameter on R2A agar after 48 h of incubation at 30 ºC.
Facultatively anaerobic. Growth occurs at 10-37 ºC (optimum, 30-35 ºC), at pH 6.0-8.0
(optimum, pH 6.0-7.0) and with 0-1.0% NaCl (optimum, 0%).
approximately 0.7-1.2 mm in diameter on R2A agar after 48 h of incubation at 30 ºC.
Facultatively anaerobic. Growth occurs at 10-37 ºC (optimum, 30-35 ºC), at pH 6.0-8.0
(optimum, pH 6.0-7.0) and with 0-1.0% NaCl (optimum, 0%).
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Pseudomonadota (Proteobacteria), Class Betaproteobacteria, Order Neisseriales, Family Neisseriaceae, Genus Rivicola,
Rivicola pingtungensis Sheu et al. 2014, type species of the genus.
Rivicola pingtungensis Sheu et al. 2014, type species of the genus.
Gram-negative straight rods, 0.3-0.6 μm in diameter and 1.4-3.2 μm in length after 48
h of incubation on R2A agar at 30 ºC. Non-motile. Endospores are not formed.
h of incubation on R2A agar at 30 ºC. Non-motile. Endospores are not formed.
Isolated from a freshwater sample collected from the Jin-Shih Lake, Kaoshiung County, Taiwan.
Sensitive to penicillin G (10 U/disk), ampicillin (10 μg), chloramphenicol (30 μg), gentamicin (10 μg), rifampicin (5 μg), kanamycin (30
μg), tetracycline (30 μg), novobiocin (30 μg), streptomycin (10 μg), sulfamethoxazole + trimethoprim (23.75+1.25 μg) and nalidixic acid
(30 μg).
Sensitive to penicillin G (10 U/disk), ampicillin (10 μg), chloramphenicol (30 μg), gentamicin (10 μg), rifampicin (5 μg), kanamycin (30
μg), tetracycline (30 μg), novobiocin (30 μg), streptomycin (10 μg), sulfamethoxazole + trimethoprim (23.75+1.25 μg) and nalidixic acid
(30 μg).
Undetermined.
- Sheu, S.-Y., Chen, J.-C., Young, C.-C. and Chen, W.-M. 2014. Rivicola pingtungensis gen. nov., sp. nov., a new member of the
family Neisseriaceae isolated from a freshwater river. Int. J. Syst. Evol. Microbiol., 64, 2009-2016.
Description is based on API 20 NE, API ZYM kits and GN2 microplate results.
Positive results for acid phosphatase, catalase, esterase C4, esterase C8, nitrate reduction, naphthol-AS-BI-phosphohydrolase,
oxidase, Tween 20 & 60, urease, assimilation of: adipate, arabinose, caprate, glucose, gluconate, malate, mannose, mannitol,
N-acetylglucosamine and maltose.
Can utilize as sole carbon source: alpha-lactose, lactulose, D-mannitol, pyruvic acid methyl ester, acetic acid, cis-aconitic acid, citric
acid, formic acid, phydroxyphenylacetic acid, itaconic acid, DL-lactic acid, propionic acid, succinic acid, bromosuccinic acid,
succinamic acid, D-alanine, L-alanine, L-alanyl glycine, L-asparagine, L-glutamic acid, L-proline, L-serine and urocanic acid.
Negative results for alkaline phosphatase, arginine dihydrolase, casein hydrolysis, chitin hydrolysis, corn oil hydrolysis, DNase,
esculin hydrolysis, alpha-fucosidase, alpha- and beta-galactosidase, beta-glucuronidase, alpha- and beta-glucosidase,
N-acetyl-beta-glucosaminidase, gelatin hydrolysis, indole production, lipase C14, leucine arylamidase, cystine arylamidase,
alpha-mannosidase, starch hydrolysis, Tween 40 & 80, trypsin, alpha-chymotrypsin, valine arylamidase, acid production from
glucose, assimilation of citrate and phenylacetate.
Positive results for acid phosphatase, catalase, esterase C4, esterase C8, nitrate reduction, naphthol-AS-BI-phosphohydrolase,
oxidase, Tween 20 & 60, urease, assimilation of: adipate, arabinose, caprate, glucose, gluconate, malate, mannose, mannitol,
N-acetylglucosamine and maltose.
Can utilize as sole carbon source: alpha-lactose, lactulose, D-mannitol, pyruvic acid methyl ester, acetic acid, cis-aconitic acid, citric
acid, formic acid, phydroxyphenylacetic acid, itaconic acid, DL-lactic acid, propionic acid, succinic acid, bromosuccinic acid,
succinamic acid, D-alanine, L-alanine, L-alanyl glycine, L-asparagine, L-glutamic acid, L-proline, L-serine and urocanic acid.
Negative results for alkaline phosphatase, arginine dihydrolase, casein hydrolysis, chitin hydrolysis, corn oil hydrolysis, DNase,
esculin hydrolysis, alpha-fucosidase, alpha- and beta-galactosidase, beta-glucuronidase, alpha- and beta-glucosidase,
N-acetyl-beta-glucosaminidase, gelatin hydrolysis, indole production, lipase C14, leucine arylamidase, cystine arylamidase,
alpha-mannosidase, starch hydrolysis, Tween 40 & 80, trypsin, alpha-chymotrypsin, valine arylamidase, acid production from
glucose, assimilation of citrate and phenylacetate.
(c) Costin Stoica
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