Pseudomonas sichuanensis sp. nov., isolated from hospital sewage Free

Abstract

A bacterial strain, designated WCHPs060039, 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 WCHPs060039 belonged to the genus Pseudomonas and was closely related to members of the Pseudomonas putida group, with the highest similarities to Pseudomonas entomophila L48 (99.5 %), Pseudomonas mosselii CIP 105259 (99.52 %), Pseudomonas taiwanensis BCRC 17751 (99.45 %) and Pseudomonas plecoglossicida NBRC 103162 (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 WCHPs060039 from the closely related Pseudomonas species. It is therefore evident that strain WCHPs060039 represents a novel species of the genus Pseudomonas , for which the name Pseudomonas sichuanensis sp. nov. is proposed. The type strain is WCHPs060039 (GDMCC 1.1424=CNCTC 7662).

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2018-12-19
2024-03-28
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