International journal of systematic and evolutionary microbiology最新文献

{"title":"<i>Corynebacterium mayonis</i> sp. nov. isolated from a human blood culture.","authors":"Hamidu T Mohammed, Christina A Koscianski, Taylor E Berent, Garrett G Gordy, Stephen Johnson, Sebastian C Herren, Robin Patel","doi":"10.1099/ijsem.0.006632","DOIUrl":"https://doi.org/10.1099/ijsem.0.006632","url":null,"abstract":"<p><p>A novel <i>Corynebacterium</i> species, strain BD556^T, isolated from blood, was identified at Mayo Clinic, Rochester, MN, USA. After failing definitive identification using MALDI-ToF MS and partial 16S rRNA gene sequencing, BD556^T was characterized using a polyphasic approach, including phenotypic, biochemical and whole-genome sequencing methods. BD556^T was a Gram-positive rod with clubbed ends, facultatively anaerobic, catalase-positive, oxidase-negative and non-motile. Colonies were white, opaque and non-haemolytic with halo-like edges. BD556^T grew at 35 °C in room air, with CO₂ and under anaerobic conditions. BD556^T grew well in 0 and 6% NaCl and weakly in 10% NaCl. The genome size was 2 349 779 bp with a G+C content of 60.39%. Phylogenetic analysis using 16S rRNA gene sequence analysis, average nucleotide identity and digital DNA-DNA hybridization between the genome of BD556^T and the closest type strains from the Type Strain Genome Server database yielded separation values well beyond those required for species delineation. Chemotaxonomic analyses of BD556^T revealed ribose, arabinose and galactose as whole-cell sugars and an A1γ <i>meso</i>-diaminopimelic acid-direct peptidoglycan type. The major cellular fatty acids were C_15 : 0 (21.0%), C_16 : 0 (14.8%), C_17 : 1 ω9c (26.2%), C_17 : 0 (13.3%) and C_18 : 1 ω9c (18.3%). Polar lipids included diphosphatidylglycerol, phosphatidylglycerol and unidentified glycolipids and phospholipids. BD556^T also contained mycolic acids (32-36 carbons) typical of corynebacteria. The respiratory quinones were dominated by MK-8(H₂) (71.2%) and MK-9(H₂) (25.9%), with smaller amounts of MK-7(H₂) and MK-10(H₂). The results presented support the tenet that BD556^T (=TSD 427^T=NCTC 15078^T) is a novel species for which the name <i>Corynebacterium mayonis</i> sp. nov. is proposed.</p>","PeriodicalId":14390,"journal":{"name":"International journal of systematic and evolutionary microbiology","volume":"75 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143065684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"<i>Streptacidiphilus alkalitolerans</i> sp. nov., <i>Streptacidiphilus cavernicola</i> sp. nov. and <i>Streptacidiphilus jeojiensis</i> sp. nov. isolated from a cave, and an emended description of the genus <i>Streptacidiphilus</i>.","authors":"Soon Dong Lee, Hong Lim Yang, In Seop Kim","doi":"10.1099/ijsem.0.006652","DOIUrl":"https://doi.org/10.1099/ijsem.0.006652","url":null,"abstract":"<p><p>Six Gram-reaction-positive, strictly aerobic, mycelium-forming actinobacteria were isolated from soils collected from a natural cave in Jeju, Republic of Korea. The isolates produced well-developed, branched, substrate mycelia and white aerial mycelia that differentiated into straight or flexuous chains of smooth-surfaced spores. Cells showed growth at 15-30 °C, pH 3.5-8.0 and 0-1% (w/v) NaCl. Most of the isolates also grew at pH 10.0. The cell-wall peptidoglycan in common contained ll-diaminopimelic acid, galactose, glucose, mannose and rhamnose. The major menaquinone was MK-9(H₆) and MK-9(H₈). The polar lipids in common contained phosphatidylglycerol, phosphatidylinositol and an unidentified phospholipid, with the presence of diphosphatidylglycerol and phosphatidylethanolamine in some strains. The predominant fatty acids in common were anteiso-C_15 : 0, iso-C_16 : 0 and C_16 : 0. Strains N1-1^T, N1-3 and N1-12 contained genomes of 8.44-8.77 Mbp, and strains N1-5 and N1-10^T consisted of genomes of 9.00-9.17 Mbp, while strain N8-3^T contained the smallest genome (7.33 Mbp) among the isolates. The genomic DNA G+C contents of the isolates were 71.5-72.2%. Three representatives of the isolates encompassed 16-29 biosynthetic gene clusters predicted to encode for secondary metabolites. The core genome-based phylogenomic tree showed that they formed three distinct clusters within the genus <i>Streptacidiphilu</i>s, with the closest relative, the type strain of <i>Streptacidiphilu</i>s <i>carbonis</i>, which was also supported by 16S rRNA gene phylogeny. The orthologous average nucleotide identity (≤88.2%) and digital DNA-DNA hybridization (≤30.3%) between three representatives of the isolates and members of the genus <i>Streptacidiphilu</i>s and among them supported that the isolates represent three new species of the genus <i>Streptacidiphilu</i>s, for which the names <i>Streptacidiphilus alkalitolerans</i> [type strain, N1-1^T (=KCTC 19224^T=DSM 45080^T)], <i>Streptacidiphilus cavernicola</i> [type strain, N8-3^T (=KCTC 29470^T=DSM 117389^T)] and <i>Streptacidiphilus jeojiensis</i> sp. nov. [type strain, N1-10^T (=KCTC 19257^T=DSM 117391^T=NRRL B-24556^T)] are proposed.</p>","PeriodicalId":14390,"journal":{"name":"International journal of systematic and evolutionary microbiology","volume":"75 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143065694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Genomic insights support the taxonomic differentiation of <i>Streptococcus thermophilus</i> Orla-Jensen 1919 (Approved Lists 1980) and <i>Streptococcus salivarius</i> Andrewes and Horder 1906 (Approved Lists 1980) as individual species.","authors":"Tengfei Tang, Yiru Liu, Yanhua Cao, Kun Cheng, Denise Lindsay, Francois Bourdichon, Aurélie Dubois-Lozier, Shalome Bassett, Yunmei Xu, Huifen Feng, Zhiquan Song, Rui Liu, Lizheng Guo, Su Yao","doi":"10.1099/ijsem.0.006612","DOIUrl":"https://doi.org/10.1099/ijsem.0.006612","url":null,"abstract":"<p><p><i>Streptococcus thermophilus</i> is widely used as a starter culture in the production of cheese, yoghurt and various cultured dairy products, which holds considerable significance in both research and practical applications within the food industry. Throughout history, the taxonomy of <i>S. thermophilus</i> has undergone several adjustments and revisions. In 1984, based on the result of DNA-DNA hybridization, <i>S. thermophilus</i> was reclassified as <i>Streptococcus salivarius</i> subsp. <i>thermophilus</i>. Subsequently, in 1991, Schleifer <i>et al</i>. proposed the revival of the species <i>S. thermophilus</i> also relying on a DNA-DNA hybridization study conducted under stringent conditions. At present, both the taxonomic names, <i>S. thermophilus</i> and <i>S. salivarius</i> subsp. <i>thermophilus</i>, are considered as synonyms and adopted within scientific research, regulatory oversight and relevant industries, leading to a certain degree of confusion. A precise and scientifically accurate taxonomic status is imperative as a foundational prerequisite for a strain evaluation and its application in food manufacture and regulatory contexts. In this study, we utilized whole-genome sequencing to evaluate the genetic relationship of <i>S. thermophilus</i> and <i>S. salivarius</i>. At the gene level, phylogenetic analyses were conducted on 52 <i>S</i>. <i>thermophilus</i> strains and 63 <i>S</i>. <i>salivarius</i> strains based on sequences of both the 16S rRNA gene and the housekeeping gene, <i>recA</i>. Additionally, a core-gene phylogeny was inferred using the whole-genome sequencing data of 216 strains within the <i>Streptococcus</i> genus. This analysis facilitated an exhaustive evaluation of the evolutionary interconnections among the studied strains. At the genetic level, average nucleotide identity (ANI) and digital DNA-DNA hybridization (dDDH) were used to verify the species identity of <i>S. thermophilus</i> and <i>S. salivarius</i>. The results of phylogenetic analysis, ANI and dDDH all collectively confirm that <i>S. thermophilus</i> and <i>S. salivarius</i> are distinct species. These research results provide sufficient scientific evidence to support the definitive scientific and rational application of the name of <i>S. thermophilus</i>.</p>","PeriodicalId":14390,"journal":{"name":"International journal of systematic and evolutionary microbiology","volume":"75 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143005041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"<i>Flavobacterium magnesitis</i> sp. nov. and <i>Flavobacterium zubiriense</i> sp. nov., two novel <i>Flavobacterium</i> species isolated from alkaline magnesite residues.","authors":"Leonor Matos, Lorrie Maccarrio, Ana Paula Chung, Diogo N Proença, Søren Sørensen, Paula V Morais, Romeu Francisco","doi":"10.1099/ijsem.0.006660","DOIUrl":"10.1099/ijsem.0.006660","url":null,"abstract":"<p><p>Three bacterial strains, designated FZUC8N2.13^T, FBOR7N2.3^T and FZUR7N2.5, were isolated from distinct magnesite residues in Spain. Phylogenetic and phylogenomic analysis places them within the genus <i>Flavobacterium</i>. Strains FBOR7N2.3^T and FZUR7N2.5 share 100% of similarity in the 16S rRNA gene sequence, and both are most closely related to <i>Flavobacterium cellulosilyticum</i> AR-3-4^T with which they share 97.5% of 16S rRNA gene similarity. Strain FZUC8N2.13^T forms a distinct lineage most closely related to <i>Flavobacterium lacustre</i> IMCC36792^T with 97.7% 16S rRNA gene similarity. The closest phylogenomic neighbours of these three strains are <i>Flavobacterium flevense</i> DSM 1076^T, '<i>Flavobacterium undicola</i>' BBQ-18^T and <i>Flavobacterium commune</i> PK15^T. The average nucleotide identity and digital DNA-DNA hybridization values between the three strains and closest members of the genus <i>Flavobacterium</i> are below the threshold values of 95% and 70%, respectively. Strains FZUC8N2.13^T, FBOR7N2.3^T and FZUR7N2.5 stain Gram-negative, are rod-shaped and form yellow colonies. Optimum growth occurs at 25 °C and pH 7. The genomic G+C contents are 33.4 mol% for strain FZUC8N2.13^T and 33.2 mol% for strains FBOR7N2.3^T and FZUR7N2.5. The major isoprenoid quinone is menaquinone 6. The major fatty acids are summed feature 3 (C_16 : 1 ω7c and/or C_16 : 1 ω6c) (22.6-31.1%), iso-C_15 : 0 (13.6-16.2 %) and anteiso-C_15 : 0 (8.7-10.5%). The polar lipids consist of two aminolipids, two aminophospholipids and one glycolipid. The phylogenetic, phylogenomic, phenotypic and chemotaxonomic data indicate that FZUC8N2.13^T, FBOR7N2.3^T and FZUR7N2.5 are distinct from the described species of <i>Flavobacterium</i> and should be classified as novel species, for which we propose the names <i>Flavobacterium zubiriense</i> for strain FZUC8N2.13^T (=UCCCB 179^T=CECT 30977^T) and <i>Flavobacterium magnesitis</i> for strains FBOR7N2.3^T (=UCCCB 178^T=CECT 30976^T) and FZUR7N2.5 (=UCCCB 216=CECT 31036).</p>","PeriodicalId":14390,"journal":{"name":"International journal of systematic and evolutionary microbiology","volume":"75 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143052533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"<i>Vishniacozyma siamensis</i> sp. nov., a new anamorphic tremellomycetous yeast species isolated from a mangrove forest in Thailand.","authors":"Pajongwan Gungprakhon, Maneerat Khammeankea, Savitree Limtong, Pannida Khunnamwong","doi":"10.1099/ijsem.0.006623","DOIUrl":"10.1099/ijsem.0.006623","url":null,"abstract":"<p><p>Six strains (DMKU-SG26, DMKU-SG42, DMKU-SYM22, DMKU-RG41, DMKU-RX317 and DMKU-RGM25) representing a novel basidiomycetous yeast species were isolated from leaf surfaces of mangrove plants collected in Thailand. Pairwise sequence analysis indicated that the six strains either had identical nucleotide substitution in the D1/D2 domains of the large subunit (LSU) rRNA gene sequences or differed by one to three nucleotide(s). They also had identical or differed by one to five nucleotide substitution(s) in the internal transcribed spacer (ITS) regions. blastn searches of the GenBank database revealed that the six strains were closely related to the holotype of type strains of <i>Vishniacozyma peneaus</i>, <i>V. terrae</i>, <i>V. phoenicis</i>, <i>V. taiwanica</i> and <i>V. europaea</i>, but with 6-15 (1.14-2.48%) and 16-26 (5.4-8.8%) nucleotide substitutions in the D1/D2 domains of the LSU rRNA gene and the ITS regions, respectively. Phylogenetic analysis based on the concatenated sequences of the ITS regions and D1/D2 domains of the LSU rRNA gene showed that these strains are placed in the <i>Vishniacozyma</i> clade but were at a distinctly different position from the other recognized species of the genus. Based on the phylogenetic analysis and phenotypic characteristics, these six strains are a novel species of the genus <i>Vishniacozyma</i>, for which the name <i>Vishniacozyma siamensis</i> sp. nov. is proposed to accommodate them. The holotype is TBRC 18499^T and the ex-type culture is PYCC 10042 (=DMKU-SG26). The MycoBank number of the novel species is MB 855838.</p>","PeriodicalId":14390,"journal":{"name":"International journal of systematic and evolutionary microbiology","volume":"75 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142921787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"<i>Stachybotrys qujingensis</i> sp. nov., a new hyphomycete from desertified rocky soil in southwest China.","authors":"Xing-Wen Dai, Zhi-Yu Ren, Xue-Rong Pan, Ze-Fen Yu","doi":"10.1099/ijsem.0.006664","DOIUrl":"https://doi.org/10.1099/ijsem.0.006664","url":null,"abstract":"<p><p>Two strains of <i>Stachybotrys</i>, identified based on morphology and phylogenetic analysis, were isolated from rocky desertification soils in Yunnan province. Phylogenetic analyses inferred from three loci (the internal transcribed spacer of the nuclear ribosomal RNA gene, β-tubulin and RNA polymerase II second-largest subunit) showed that the two strains formed a single clade and were introduced as a new species of <i>Stachybotrys</i>, <i>S. qujingensis. S. qujingensis</i> is characterized by having ampulliform or broadly fusiform conidiogenous cells and dark olivaceous-green, oblong-ellipsoidal conidia. Phylogenetically, <i>S. qujingensis</i> is most closely related to <i>S. musae</i>, but it distinguishes the latter by longer and narrower conidia. Descriptions, illustrations and phylogenetic placement of <i>S. qujingensis</i> were provided.</p>","PeriodicalId":14390,"journal":{"name":"International journal of systematic and evolutionary microbiology","volume":"75 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143065693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"<i>Streptococcus suivaginalis</i> sp. nov., <i>Streptococcus iners</i> sp. nov. and <i>Streptococcus iners</i> subsp. <i>hyiners</i> subsp. nov. isolated from pigs.","authors":"Tracy L Nicholson, Keira L Stuart, Darrell O Bayles","doi":"10.1099/ijsem.0.006631","DOIUrl":"10.1099/ijsem.0.006631","url":null,"abstract":"<p><p>Three novel strains within the genus <i>Streptococcus</i> (29887^T, 29892^T and 29896^T) were isolated from healthy pigs during routine veterinary physical exams. All three strains were non-motile and non-spore-forming Gram-positive cocci. The complete genome of each strain was attained, and phylogenetic analyses were performed. Comparison of the genomes of 29887^T, 29892^T and 29896^T to the genomes of other <i>Streptococcus</i> strains revealed digital DNA-DNA hybridization (dDDH) values between 21.2% and 53.9% and average nucleotide identity (ANI) values between 70.00% and 94.44%. Phylogenetic analyses suggested that each strain, 29896^T (<i>S. suivaginalis</i> sp. nov.), 29887^T (<i>S. iners</i> sp. nov.) and 29892^T (<i>S. iners</i> subsp. <i>hyiners</i> subsp. nov.), may represent a novel species within the genus <i>Streptococcus</i>, while ANI analysis indicated that strains 29896^T (<i>S. suivaginalis</i> sp. nov.) and 29887^T (<i>S. iners</i> sp. nov.) represent novel species within the genus <i>Streptococcus,</i> and 29892^T (<i>S. iners</i> subsp. <i>hyiners</i> subsp. nov.) represents a novel subspecies of 29887^T (<i>S. iners</i> sp. nov.). Based upon the combined data presented in this study, two novel species, <i>Streptococcus suivaginalis</i> sp. nov. (type strain, 29896^T=NRRL B-65677^T=NCTC 14941^T) and <i>Streptococcus iners</i> sp. nov. (type strain, 29887^T=NRRL B-65675^T=NCTC 14939^T) are proposed, and one novel subspecies, <i>Streptococcus iners</i> subsp. <i>hyiners</i> subsp. nov. (type strain, 29892^T=NRRL B-65676^T=NCTC 14940^T) is proposed.</p>","PeriodicalId":14390,"journal":{"name":"International journal of systematic and evolutionary microbiology","volume":"75 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11753468/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143004727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"<i>Ascidiimonas meishanensis</i> sp. nov. and <i>Leptobacterium meishanense</i> sp. nov., two bacteria isolated from marine sediment in the East China Sea.","authors":"Hao Wang, Huiting Wang, Xinyu Liu, Dawoon Jung, Eun-Young Seo, Shan He, Weiyan Zhang, Lijian Ding","doi":"10.1099/ijsem.0.006653","DOIUrl":"10.1099/ijsem.0.006653","url":null,"abstract":"<p><p>Two Gram-stain-negative, curved-rod-shaped, non-motile and aerobic bacteria W6^T and I13^T were isolated from marine sediment samples collected from Meishan Island located in the East China Sea. Catalase and oxidase activities and hydrolysis of Tween 40, 60 and 80 were positive for both strains, while nitrate reduction, indole production, methyl red reaction and H₂S production were negative. Phylogenetic analyses based on 16S rRNA and genome sequences revealed that strains W6^T and I13^T formed distinct phylogenetic lineages within the genera <i>Ascidiimonas</i> and <i>Leptobacterium</i>, respectively. Strain W6^T showed the closest relatedness to <i>Ascidiimonas aurantiaca</i> N5DA8-2C^T with 93.9% 16S rRNA gene sequence similarity, 70.7% average nucleotide identity (ANI), 71.0% average amino acid identity (AAI) and 16.4% digital DNA-DNA hybridization (dDDH) values, while strain I13^T was most closely related to <i>Leptobacterium flavescens</i> YM3-301^T with 92.1% 16S rRNA gene sequence similarity, 70.5% ANI, 72.1% AAI and 17.2% dDDH values. The two novel strains shared 92.0% 16S rRNA gene sequence similarity to each other and were identified as two distinct species based on 70.7% ANI, 70.4% AAI and 17.1% dDDH values calculated using whole-genome sequences. The genomes of strains W6^T and I13^T were 4.59 Mbp with a G+C content of 34.5 mol% and 2.38 Mbp with a G+C content of 36.2 mol%, respectively. The only respiratory quinone was menaquinone-6, the major polar lipid was phosphatidylethanolamine and the major cellular fatty acids were iso-C_15 : 0, iso-C_15 : 1 G and iso-C_17 : 0 3-OH. Based on phenotypic, chemotaxonomic and genotypic data, strains W6^T and I13^T are considered to represent two novel species in the genera <i>Ascidiimonas</i> and <i>Leptobacterium</i>, respectively, in the family Flavobacteriaceae, for which the names <i>Ascidiimonas meishanensis</i> sp. nov. and <i>Leptobacterium meishanense</i> sp. nov. are proposed. The type strains are W6^T (=KCTC 102201^T=MCCC 1K08928^T) and I13^T (=KCTC 102202^T=MCCC 1K08929^T), respectively.</p>","PeriodicalId":14390,"journal":{"name":"International journal of systematic and evolutionary microbiology","volume":"75 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143052526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"International Committee on Systematics of Prokaryotes (ICSP) Subcommittee on the Taxonomy of <i>Campylobacter</i> and related bacteria: minutes of the closed meetings, 17 January and 31 January 2024.","authors":"Stephen L W On","doi":"10.1099/ijsem.0.006618","DOIUrl":"https://doi.org/10.1099/ijsem.0.006618","url":null,"abstract":"","PeriodicalId":14390,"journal":{"name":"International journal of systematic and evolutionary microbiology","volume":"75 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143005143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"<i>Pseudoalteromonas qingdaonensis</i> sp. nov., isolated from the intestines of <i>Ilyoplax deschampsi</i>.","authors":"Xingyue Lin, Shuqian Zhang, Suyun Fang, Xiaoke Hu, Lianju Ma","doi":"10.1099/ijsem.0.006625","DOIUrl":"https://doi.org/10.1099/ijsem.0.006625","url":null,"abstract":"<p><p>A Gram-stain-negative, aerobic, motile, catalase-positive, oxidase-positive, short rod-shaped marine bacterium, designated as YIC-827^T, was isolated from Qingdao, Shandong Province, China. The results showed that cells of strain YIC-827^T could grow optimally at 25-35 °C, pH 6.5-7.5 and 2-7% (w/v) NaCl. Phylogenetic analysis based on 16S rRNA gene sequence showed that the strain YIC-827^T was a member of the genus <i>Pseudoalteromonas</i>. The closest relative to this strain was <i>Pseudoalteromonas ruthenica</i> KMM 300^T, with a similarity of 98.39%. The digital DNA-DNA hybridization value between the new isolate and phylogenetically related species is 19.6%. Strain YIC-827^T could decompose sodium alginate, casein and esters (Tween 20, Tween 40, Tween 60 and Tween 80), but could not hydrolyse starch, cellulose and DNA. The fatty acid profile of a strain consists of a large number of C_16:0, C_18:1 ω7c and C_16:1 ω7c/_C16:1 ω6c. The G+C content of the DNA of this strain was determined to be 48.93%. Based on phenotypic characteristics, phylogenetic analysis and DNA-DNA correlation data, the strain YIC-827 ^T represents a novel species of the genus <i>Pseudoalteromonas</i> with the name <i>Pseudoalteromonas qingdaonensis</i> sp. nov. The type strain of <i>P. qingdaonensis</i> sp. is strain YIC-827^T (=MCCC 1K08807^T=CGMCC 1.62085^T=KCTC 8212^T).</p>","PeriodicalId":14390,"journal":{"name":"International journal of systematic and evolutionary microbiology","volume":"75 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142948730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}