Canadian journal of microbiology最新文献_第4页

Tolerance mechanisms and molecular epidemiology of reduced susceptibility to chlorhexidine digluconate in different species of the Acinetobacter baumannii complex. 不同种类鲍曼不动杆菌复合物对二光酸氯己定敏感性降低的耐受性机制和分子流行病学。

IF 1.8 4区生物学

Canadian journal of microbiology Pub Date : 2025-01-01 Epub Date: 2024-12-20 DOI: 10.1139/cjm-2024-0174

Liqiong Chen, Shixing Liu, Na Huang, Chunquan Xu, Cui Zhou, Lingbo Wang, Xiangkuo Zheng, Tieli Zhou, Pingting Yu

{"title":"Tolerance mechanisms and molecular epidemiology of reduced susceptibility to chlorhexidine digluconate in different species of the Acinetobacter baumannii complex.","authors":"Liqiong Chen, Shixing Liu, Na Huang, Chunquan Xu, Cui Zhou, Lingbo Wang, Xiangkuo Zheng, Tieli Zhou, Pingting Yu","doi":"10.1139/cjm-2024-0174","DOIUrl":"10.1139/cjm-2024-0174","url":null,"abstract":"The objective of this study was to compare chlorhexidine digluconate and other antibiotics susceptibility of four species of theAcinetobacter baumannii complex, and further investigate the chlorhexidine digluconate (CHG) tolerance mechanisms and molecular epidemic characteristics. Of 889 A. baumannii complex isolates, A. baumannii, A. nosocomialis, A. pittii, and A. seifertii accounted for 84.2%, 10.9%, 3.4%, and 1.5%. Acinetobacter baumannii was generally resistant to all tested antibiotics, while other three species were commonly more susceptible; 92.1% (313/340) CHG-tolerant A. baumannii, 19.6% (19/97) CHG-tolerant A. nosocomialis, 3.3% (1/30) CHG-tolerant A. pittii, and 15.4% (2/13) CHG-tolerant A. seifertii were identified. Furthermore, compared to A. baumannii ATCC 19606, upregulated expression was found in qacEΔ1, fabI, and efflux pump encoding genes in CHG-tolerant A. baumannii, but the expression level of oprD was reduced. Additionally, only the expression level of fabI was increased in the CHG-tolerant A. nosocomialis, and the expression level of adeG was increased in the CHG-tolerant A. pittii and A. seifertii. Furthermore, CHG-tolerant A. baumannii may have a relatively high clonal correlation, the predominant sequence type of which was ST208 (90%, 36/40). It is rather necessary to identify specific species members among the A. baumannii complex for clinical treatment options and antibiotics resistance monitoring.","PeriodicalId":9381,"journal":{"name":"Canadian journal of microbiology","volume":" ","pages":"1-11"},"PeriodicalIF":1.8,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142869396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Morchella capensis sp. nov., the Fynbos morel-the first description of an endemic Morchella species from Africa.

IF 1.8 4区生物学

Canadian journal of microbiology Pub Date : 2025-01-01 DOI: 10.1139/cjm-2023-0224

B Van der Merwe, J Williams, E Le Roux, A Van Staden, G Lawrence, K Jacobs

引用次数: 0

BEVA2.0: modular assembly of golden gate-compatible vectors with expanded utility for genetic engineering.

IF 1.8 4区生物学

Canadian journal of microbiology Pub Date : 2025-01-01 DOI: 10.1139/cjm-2024-0246

Barney A Geddes, Riley Williamson, Jake Schumacher, Ahmad Ardi, Garrett Levin, Emily Červenka, Rui Huang, George C diCenzo

引用次数: 0

Diversity and distribution characteristics of myxobacteria in the rhizosphere and nonrhizosphere soils of the halophyte Haloxylon ammodendron in the high saline-alkaline Ebinur Lake Wetland.

IF 1.8 4区生物学

Canadian journal of microbiology Pub Date : 2025-01-01 DOI: 10.1139/cjm-2024-0045

Xiaoyun Qi, Suhui Hou, Wenge Hu, Cheng Ding, Yang Li, Jie Xiong

{"title":"Diversity and distribution characteristics of myxobacteria in the rhizosphere and nonrhizosphere soils of the halophyte Haloxylon ammodendron in the high saline-alkaline Ebinur Lake Wetland.","authors":"Xiaoyun Qi, Suhui Hou, Wenge Hu, Cheng Ding, Yang Li, Jie Xiong","doi":"10.1139/cjm-2024-0045","DOIUrl":"https://doi.org/10.1139/cjm-2024-0045","url":null,"abstract":"This study employed Illumina HiSeq high-throughput sequencing technology to analyze the V4-V5 regions of myxobacterial 16S rRNA in rhizosphere and nonrhizosphere soils of Haloxylon ammodendron in the saline-alkaline wetland of Ebinur Lake, with the aim of investigating the community structure and diversity of myxobacteria. Results indicated that myxobacterial communities in rhizosphere soils exhibited greater diversity and richness compared to nonrhizosphere soils. Soil physicochemical properties, particularly moisture content, were identified as key environmental factors influencing myxobacterial diversity. The halotolerant genus Haliangium was found to be predominant under saline-alkaline conditions. Additionally, myxobacteria demonstrated distinct ecological specificity and environmental adaptability between rhizosphere and nonrhizosphere soils. For example, the genus Enhygromyxa exhibited a negative correlation with soil moisture content in rhizosphere soils but a positive correlation with soil electrical conductivity in nonrhizosphere soils. Co-occurrence network analysis revealed complex interaction patterns among myxobacterial genera and other bacterial genera, with closer interactions observed in rhizosphere soils. This study highlights the importance of environmental factors in regulating microbial community structure and function in saline-alkaline wetlands, providing new insights into the ecological roles and interaction mechanisms of myxobacteria within the ecosystem.","PeriodicalId":9381,"journal":{"name":"Canadian journal of microbiology","volume":"71 ","pages":"1-17"},"PeriodicalIF":1.8,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143673369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Antimicrobial resistance in Klebsiella pneumoniae: an overview of common mechanisms and a current Canadian perspective. 肺炎克雷伯氏菌的抗菌药耐药性：常见机制概述和当前加拿大的观点。

IF 1.8 4区生物学

Canadian journal of microbiology Pub Date : 2024-12-01 Epub Date: 2024-08-30 DOI: 10.1139/cjm-2024-0032

Hannah G Braun, Sumudu R Perera, Yannick Dn Tremblay, Jenny-Lee Thomassin

引用次数: 0

Lettuce seed pelleting with Pseudomonas sp. 31-12: plant growth promotion under laboratory and greenhouse conditions. 使用假单胞菌 31-12 对莴苣种子进行颗粒处理：在实验室和温室条件下促进植物生长。

IF 1.8 4区生物学

Canadian journal of microbiology Pub Date : 2024-12-01 Epub Date: 2024-08-08 DOI: 10.1139/cjm-2024-0071

Jakkrapong Kangsopa, Russell K Hynes, Boonmee Siri

{"title":"Lettuce seed pelleting with Pseudomonas sp. 31-12: plant growth promotion under laboratory and greenhouse conditions.","authors":"Jakkrapong Kangsopa, Russell K Hynes, Boonmee Siri","doi":"10.1139/cjm-2024-0071","DOIUrl":"10.1139/cjm-2024-0071","url":null,"abstract":"Plant growth promotion by Pseudomonas sp. 31-12 incorporated into a lettuce seed pelleting matrix was studied. We examined (1) the effect of five rhizosphere derived bacterial strains on green oak lettuce (Lactuca sativa L.) seed germination, root and shoot growth, as a strain selection step for seed coating and seed pelletizing studies, (2) population stability of Pseudomonas sp. 31-12 incorporated into a pelleting matrix on lettuce seed stored three months at 4 °C, and (3) lettuce growth promotion in the laboratory and greenhouse by Pseudomonas sp. 31-12 coated and pelletized seed. A spontaneous streptomycin mutant of Pseudomonas sp. 31-12 (str) was used to determine population size on seed and roots of 15- and 30-day-old lettuce. The population of Pseudomonas sp. 31-12str on coated and pelleted seed decreased from 104 cfu/seed to 103 cfu/seed after 3 months storage at 4 °C. However, the population exceeded 104 cfu/g root dry mass and 105/g root dry mass after 15 days and 30 days in the greenhouse. Leaf fresh mass was significantly increased (P ≤ 0.05) with Pseudomonas sp. 31-12 seed treatment as compared to noninoculated seed. In conclusion, pelletized lettuce seed with Pseudomonas sp. 31-12 promoted growth and yield in the greenhouse.","PeriodicalId":9381,"journal":{"name":"Canadian journal of microbiology","volume":" ","pages":"529-537"},"PeriodicalIF":1.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141905928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tracking the trajectory of frankia research through bibliometrics: trends and future directions. 通过文献计量学跟踪法兰克尼亚研究的轨迹：趋势和未来方向。

IF 1.8 4区生物学

Canadian journal of microbiology Pub Date : 2024-12-01 Epub Date: 2024-09-10 DOI: 10.1139/cjm-2024-0030

Ridha Mhamdi, Maher Gtari

{"title":"Tracking the trajectory of frankia research through bibliometrics: trends and future directions.","authors":"Ridha Mhamdi, Maher Gtari","doi":"10.1139/cjm-2024-0030","DOIUrl":"10.1139/cjm-2024-0030","url":null,"abstract":"Frankia represent a unique group of filamentous, sporangia-forming bacteria, renowned for their exceptional capacity to establish symbiotic partnerships with actinorhizal plants. The objective of this paper is to offer quantitative insights into the current state of frankia research and its future potential. A comprehensive bibliometric analysis covering the years 2000-2022 was conducted using Scopus and SciVal. A steady increase in both annual publication and international collaboration has been observed, particularly since 2013. Research performance metrics for the last 5 years (2018-2022) indicate China and India as leaders with high Field-Weighted Citation Impact scores. This analysis highlighted prominent authors, research groups, and the evolving research landscape, suggesting an increasing focus on molecular and genomic aspects. The genomic era has transformed our understanding of frankia biology, highlighting their significance in diverse ecological and agricultural contexts. This study comprehensively maps the evolving landscape of frankia research, emphasizing key milestones that have catalysed international interest in frankia-actinorhizal research, expanding our perception of frankia's capabilities beyond its traditional symbiotic role. As research in this field progresses, a deeper comprehension of frankia-plant interactions, symbiotic signalling, and the intricacies of metabolic pathways holds the promise of revealing innovative techniques for optimizing nitrogen fixation and broadening the spectrum of host plants.","PeriodicalId":9381,"journal":{"name":"Canadian journal of microbiology","volume":" ","pages":"551-564"},"PeriodicalIF":1.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142280567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Soil microbiomes from the groundnut basin of Senegal contain plant growth-promoting bacteria with potential for crop improvement in arid soils. 塞内加尔落花生盆地的土壤微生物组含有促进植物生长的细菌，具有改良干旱土壤中作物的潜力。

IF 1.8 4区生物学

Canadian journal of microbiology Pub Date : 2024-12-01 Epub Date: 2024-08-21 DOI: 10.1139/cjm-2024-0031

Niokhor Bakhoum, Ethan Humm, Noor Khan, Ann M Hirsch

{"title":"Soil microbiomes from the groundnut basin of Senegal contain plant growth-promoting bacteria with potential for crop improvement in arid soils.","authors":"Niokhor Bakhoum, Ethan Humm, Noor Khan, Ann M Hirsch","doi":"10.1139/cjm-2024-0031","DOIUrl":"10.1139/cjm-2024-0031","url":null,"abstract":"The principal methods to maintain soil fertility in Sahel soils are largely allowing fields to go fallow and manure addition. These methods are not currently sufficient to improve soil fertility. To promote biological amendments, we aimed to understand the plant-growth promoting traits of various soil microbial isolates. The soils collected in different areas in Senegal exhibited a similar eDNA profile of bacteria; the dominant microbes were Firmicutes, followed by Proteobacteria and Actinobacteria. Of 17 isolates identified and tested, the vast majority solubilized rock phosphate and a large number grew on culture medium containing 6% salt, but very few degraded starches or hydrolysed carboxymethyl cellulose or produced siderophores. Upon single inoculation, Peribacillus asahii RC16 and Dietzia cinnamea 55 significantly increased pearl millet growth and yield parameters. For cowpea, plant shoot length was significantly increased by Pseudarthrobacter phenanthrenivorans MKAG7 co-inoculated with Bradyrhizobium elkanii 20TpCR5, and nearly all rhizobacteria tested significantly improved cowpea dry weight and pod weight. Additionally, the double inoculation of Dietzia cinnamea 55 and MKAG7 significantly increased shoot length, dry weight, and seed head weight of pearl millet. These isolates are promising inoculants because they are ecologically-friendly, cost-effective, sustainable, and have fewer negative effects on the soil and its inhabitants.","PeriodicalId":9381,"journal":{"name":"Canadian journal of microbiology","volume":" ","pages":"538-550"},"PeriodicalIF":1.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142016458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The roles of rabies virus structural proteins in immune evasion and implications for vaccine development. 狂犬病毒结构蛋白在免疫逃避中的作用及对疫苗开发的影响。

IF 1.8 4区生物学

Canadian journal of microbiology Pub Date : 2024-11-01 Epub Date: 2024-09-19 DOI: 10.1139/cjm-2024-0023

Pei-Hua Wang, Li Xing

引用次数: 0

Prairie soil improves wheat establishment and accelerates the developmental transition to flowering compared to agricultural soils. 与农业土壤相比，草原土壤能改善小麦的生长发育，并加快向开花期的过渡。

IF 1.8 4区生物学

Canadian journal of microbiology Pub Date : 2024-11-01 Epub Date: 2024-08-07 DOI: 10.1139/cjm-2023-0237

Renee H Petipas, Cassidy Peru, Janice M Parks, Maren L Friesen, Chandra N Jack

{"title":"Prairie soil improves wheat establishment and accelerates the developmental transition to flowering compared to agricultural soils.","authors":"Renee H Petipas, Cassidy Peru, Janice M Parks, Maren L Friesen, Chandra N Jack","doi":"10.1139/cjm-2023-0237","DOIUrl":"10.1139/cjm-2023-0237","url":null,"abstract":"Less than 1% of native prairie lands remain in the United States. Located in eastern Washington, the rare habitat called Palouse prairie was largely converted to wheat monocropping. With this conversion came numerous physical, chemical, and biological changes to the soil that may ultimately contribute to reduced wheat yields. Here, we explored how wheat (Tritcum aestivum L.) seedling establishment, plant size, and heading, signifying the developmental transition to flowering, were affected by being planted in prairie soil versus agricultural soils. We then sought to understand whether the observed effects were the result of changes to the soil microbiota due to agricultural intensification. We found that prairie soil enhanced both the probability of wheat seedling survival and heading compared to agricultural soil; however, wheat growth was largely unaffected by soil source. We did not detect effects on wheat developmental transitions or phenotype when inoculated with prairie microbes compared with agricultural microbes, but we did observe general antagonistic effects of microbes on plant size, regardless of soil source. This work indicates that agricultural intensification has affected soils in a way that changes early seedling establishment and the timing of heading for wheat, but these effects may not be caused by microbes, and instead may be caused by soil nutrient conditions.","PeriodicalId":9381,"journal":{"name":"Canadian journal of microbiology","volume":" ","pages":"482-491"},"PeriodicalIF":1.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141901029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0