Shewanella intestini sp. nov., isolated from the intestine of abalone, Haliotis diversicolor.

A Gram-stain-negative, rod-shaped bacterium with a singular polar flagellum, designated as strain XMDDZSB0408T, was isolated from the intestine of adult abalone, Haliotis diversicolor. Activity of oxidase was positive and catalase activity was negative. It could grow at salinities from 3 to 6 % NaCl (w/v), and pH 7-9. It had the highest sequence similarity of <96.0 % with all previously established species for the complete 16S rRNA gene (1531 bp). The results of phylogenetic analysis indicated that the strain was affiliated to the genus Shewanella and closely related to Shewanella gaetbuli TF-27T and Shewanella japonica KMM 3299T (95.8 % sequence similarity), Shewanella electrodiphila MAR441T (95.6 %), Shewanella pacifica KMM 3597T (95.4 %), Shewanella donghaensis LT17T (95.3 %) and Shewanella olleyana ACEM 9T (94.7 %). The respiratory quinones were MK-7, Q-8, Q-7, MK-8, Q-7 (H4) and Q-6. The predominant fatty acids consisted of C16:0, summed feature 3 (comprised of C16 : 1ω7c/C16 : 1ω6c), C18 : 0, summed feature 8 (comprised of C18 : 1ω7c/C18 : 1ω6c), C12 : 0 and C14 : 0. The polar lipids were identified as phosphatidylethanolamine (PE), a glycolipid (GL), a phospholipid (PL) and one unidentified lipid (L). The DNA G+C content was 41.4 mol% calculated from the draft genome sequence. On the basis of its polyphasic taxonomic properties, strain XMDDZSB0408T represented a novel species, for which the name Shewanella intestini sp. nov. was proposed, with the type strain XMDDZSB0408T (=KCTC 52125T=MCCC 1A01895T).