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  • Title: Pseudomonas sichuanensis sp. nov., isolated from hospital sewage.
    Author: Qin J, Hu Y, Feng Y, Xaioju L, Zong Z.
    Journal: Int J Syst Evol Microbiol; 2019 Feb; 69(2):517-522. PubMed ID: 30566068.
    Abstract:
    A bacterial strain, designated WCHPs060039T, was isolated from hospital sewage in China. The strain was Gram-stain-negative, obligate aerobic, flagellum-motile and positive for oxidase and catalase. A preliminary analysis of the 16S rRNA gene sequences indicated that strain WCHPs060039T belonged to the genus Pseudomonasand was closely related to members of the Pseudomonas putida group, with the highest similarities to Pseudomonas entomophila L48T (99.5 %), Pseudomonas mosselii CIP 105259T (99.52 %), Pseudomonas taiwanensis BCRC 17751T (99.45 %) and Pseudomonas plecoglossicida NBRC 103162T (99.31 %). Whole genome sequencing of the strain was performed. Phylogenetic analysis based on a set of core gene sequences revealed that the strain was distinct from its closest Pseudomonas species. Average nucleotide identity based on blast and in silico DNA-DNA hybridizationrevealed low genome relatedness to its closest Pseudomonas species (below the recommended thresholds of 95 and 70 %, respectively, for species delineation). The major fatty acids of the strain were 16:0, 17:0 cyclo, summed feature 3 (16:1ω7c/16:1ω6c and 16:1ω6c/16:1ω7c) and summed feature 8 (18:1ω7c). The ability to utilize inositol, sorbitol and d-glucuronic acid could differentiate strain WCHPs060039T from the closely related Pseudomonas species. It is therefore evident that strain WCHPs060039T represents a novel species of the genus Pseudomonas, for which the name Pseudomonas sichuanensis sp. nov. is proposed. The type strain is WCHPs060039T (GDMCC 1.1424T=CNCTC 7662T).
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