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  • Title: Kiloniella litopenaei sp. nov., isolated from the gut microflora of Pacific white shrimp, Litopenaeus vannamei.
    Author: Wang L, Li X, Lai Q, Shao Z.
    Journal: Antonie Van Leeuwenhoek; 2015 Dec; 108(6):1293-1299. PubMed ID: 26386704.
    Abstract:
    A cream-coloured rod-shaped bacterium, designated strain P1-1(T), was isolated from the gut microflora of Pacific white shrimp (Litopenaeus vannamei) from the Taiwan Strait, China. P1-1(T) was was found to be Gram-negative, oxidase and catalase positive and motile by means of a single flagellum. Growth is observed at salinities of 0.5-7 % (w/v; optimum 3 %), at pH 6.0-10.0 (optimum pH 7.0-9.0) and at 15-37 °C (optimum 28-32 °C). Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain P1-1(T) belongs to the genus Kiloniella, and is closely related to Kiloniella spongiae MEBiC09566(T) (99.0 % similarity), followed by Kiloniella laminariae LD81(T) (96.6 % similarity). The genomic ANIm value between strain P1-1(T) and K. spongiae MEBiC09566(T) was found to be 81.7 %. The DNA-DNA hybridization estimate between strains P1-1(T) and MEBiC09566(T) was 24.6 %. The principal fatty acids detected were identified as summed feature 8 (C18:1 ω6c/C18:1 ω7c, 74.2 %) and summed feature 3 (C16:1 ω6c/C16:1 ω7c, 9.7 %). The G+C content of the chromosomal DNA, determined from the draft genome sequence, was found to be 46.1 mol%. The major respiratory quinone was determined to be Q-9, while the major polar lipids are phosphatidylethanolamine, phosphatidylglycerol, three unidentified phospholipids, one unidentified aminolipid and nine unidentified lipids. The combined genotypic and phenotypic data indicate that strain P1-1(T) represents a novel species within the genus Kiloniella, for which the name Kiloniella litopenaei sp. nov. is proposed, with the type strain P1-1(T) (=MCCC 1A09869(T) = LMG 27755(T)).
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