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Altun S, Duman M, Ay H, Saticioglu IB. Shewanella oncorhynchi sp. nov., a novel member of the genus Shewanella, isolated from Rainbow Trout (Oncorhynchus mykiss). Int J Syst Evol Microbiol 2022; 72. [DOI: 10.1099/ijsem.0.005460] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
A strain, S-1T was isolated from rainbow trout (Oncorhynchus mykiss) exhibiting clinical symptoms of lens atrophy, inappetence, visual impairment and growth retardation. The strain was identified as representing a member of the genus
Shewanella
on the basis of the results of 16S rRNA gene sequence analysis. The neighbor-joining phylogenetic tree based on 16S rRNA gene sequences indicated that S-1T clustered with
Shewanella putrefaciens
JCM 20190T,
Shewanella profunda
DSM 15900T, and
Shewanella hafniensis
P010T, sharing 99.3, 98.8 and 87.7% 16S rRNA gene similarities, respectively. A polyphasic taxonomic approach including phenotypic, chemotaxonomic, and genomic characterization was employed to ascertain the taxonomic position of S-1T within the genus
Shewanella
. The overall genome relatedness indices (OGRI) for S-1T compared with the most closely related type strains
S. hafniensis
ATCC BAA-1207T,
Shewanella baltica
NCTC 10735T,
S. putrefaciens
ATCC 8071T and
S. profunda
DSM 15900T were calculated as 40.8, 40.1, 28.5 and 27.3% for digital DNA–DNA hybridization (dDDH), and 91.6, 91.0, 86.3 and 85.1% for average nucleotide identity (ANI), respectively. OGRI values between S-1T and its close neighbours confirmed that the strain represents a novel species in the genus
Shewanella
.The DNA G+C content of the strain is 45.2%. Major fatty acids were C17 : 1ω8c, C15 : 0iso, and summed feature 3 (C16 : 1ω6c and/or C16 : 1ω7c). The predominant polar lipids were phosphatidylethanolamine, phospholipid, amino-phospholipid and unidentified lipids. The major respiratory quinones were ubiquinone-8, ubiquinone-7 and menaquinone-7. Chemotaxonomic and phylogenomic analyses of this isolate confirmed that the strain represents a novel species for which the name
Shewanella oncorhynchi
sp. nov. is proposed, with S-1T as the type strain (JCM 34183T= KCTC 82249T).
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Affiliation(s)
- Soner Altun
- Department of Aquatic Animal Diseases, Faculty of Veterinary Medicine, Bursa Uludag University, Bursa, 16059, Turkey
| | - Muhammed Duman
- Department of Aquatic Animal Diseases, Faculty of Veterinary Medicine, Bursa Uludag University, Bursa, 16059, Turkey
| | - Hilal Ay
- Department of Molecular Biology and Genetics, Faculty of Science and Arts, Ondokuz Mayis University, Samsun, 55139, Turkey
| | - Izzet Burcin Saticioglu
- Department of Aquatic Animal Diseases, Faculty of Veterinary Medicine, Erciyes University, Kayseri 38280, Turkey
- Present address: Keles Vocational School, Bursa Uludag University, Bursa, 16059, Turkey
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