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Int J Syst Evol Microbiol. 2019 Apr;69(4):970-974. doi: 10.1099/ijsem.0.003226. Epub 2019 Jan 21.

Paracoccus suum sp. nov., isolated from a pig farm dust collector.

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Agricultural Microbiology Division, National Institute of Agricultural Sciences, Rural Development Administration, Wanju-gun, Jeollabuk-do 55365, Republic of Korea.


A Gram-stain-negative, strictly aerobic, non-motile, non-spore-forming, coccoid- or short rod-shaped bacterial strain, designated SC2-6T, was isolated from a dust collector of a pig farm located in Wanju-gun, Jeollabuk-do, Republic of Korea. Strain SC2-6T grew within the ranges of 10-37 °C (28-30 °C, optimally), pH 6.0-10.0 (pH 7.0-8.0, optimally) and 0-3% NaCl (w/v). The 16S rRNA gene sequence similarity of strain SC2-6T showed the highest values to Paracoccus kondratievae GBT (96.3%), Paracoccus denitrificans DSM 413T (96.3%) and Paracoccus sanguinis 5503T (96.1%). The phylogenetic tree based on the 16S rRNA gene sequences revealed that strain SC2-6T belonged to the genus Paracoccus and clustered with Paracoccus pacificus F14T. The phylogenetic tree based on the rpoD gene sequences also demonstrated that strain SC2-6T fell into the clade of the genus Paracoccus. The DNA G+C content was 66.9 mol%. The major respiratory quinone was ubiquinone-10 and the major fatty acids (> 10% of the total fatty acids) were summed feature 8 (comprising C18 : 1 ω6c and/or C18 : 1 ω7c). The polar lipids were composed of diphosphatidylglycerol, phosphatidylcholine, an unidentified glycolipid, two unidentified aminolipids and two unidentified lipids. On the basis of phenotypic, phylogenetic and genomic data, strain SC2-6T was classified in the genus Paracoccus as a member of a novel species, for which the name Paracoccus suum sp. nov. is proposed. The type strain is SC2-6T (=KACC 19328T=NBRC 113110T).


Paracoccus suum; dust collector; new taxa; taxonomy


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