Microbiological research最新文献

{"title":"Unearthing the soil-bacteria nexus to enhance potassium bioavailability for global sustainable agriculture: A mechanistic preview","authors":"Saba Babar ,&nbsp;Amanullah Baloch ,&nbsp;Muhammad Qasim ,&nbsp;Jiyuan Wang ,&nbsp;Xiangling Wang ,&nbsp;Yuxuan Li ,&nbsp;Sarmand Khalid ,&nbsp;Cuncang Jiang","doi":"10.1016/j.micres.2024.127885","DOIUrl":"10.1016/j.micres.2024.127885","url":null,"abstract":"<div><p>Established as a plant macronutrient, potassium (K) substantially bestows plant growth and thus, global food production. It is absorbed by plants as potassium cation (K⁺) from soil solution, which is enriched through slow-release from soil minerals or addition of soluble fertilizers. Contribution of bioavailable K⁺ from soil is usually insignificant (&lt; 2 %), although the earth's crust is rich in K-bearing minerals. However, K is fixed largely in interlayer spaces of K-bearing minerals, which can be released by K-solubilizing bacteria (KSB) such as <em>Bacillus, Pseudomonas, Enterobacter,</em> and <em>Acidithiobacillus</em>. The underlying mechanisms of K dissolution by KSB include acidolysis, ion exchange reactions, chelation, complexolysis, and release of various organic and inorganic acids such as citric, oxalic, acetic, gluconic, and tartaric acids. These acids cause disintegration of K-bearing minerals and bring K⁺ into soil solution that becomes available to the plants. Current literature review updates the scientific information about microbial species, factors, and mechanisms governing the bio-intrusion of K-bearing minerals. Moreover, it explores the potential of KSB not only for K-solubilization but also to enhance bioavailability of phosphorus, nitrogen, and micronutrients, as well as its other beneficial impact on plant growth. Thus, in the context of sustainable agricultural production and global food security, utilization of KSB may facilitate plant nutrient availability, conserve natural resources, and reduce environmental impacts caused by chemical fertilizers.</p></div>","PeriodicalId":18564,"journal":{"name":"Microbiological research","volume":"288 ","pages":"Article 127885"},"PeriodicalIF":6.1,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142130078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The protective role of potassium in the adaptation of Pseudomonas protegens SN15-2 to hyperosmotic stress","authors":"Jian Wang ,&nbsp;Yaping Wang ,&nbsp;Shouquan Lu ,&nbsp;Haibo Lou ,&nbsp;XiaoBing Wang ,&nbsp;Wei Wang","doi":"10.1016/j.micres.2024.127887","DOIUrl":"10.1016/j.micres.2024.127887","url":null,"abstract":"<div><p><em>Pseudomonas protegens</em> is an important biocontrol agent with the ability to suppress plant pathogens and promote plant growth. <em>P. protegens’</em> ability to endure hyperosmotic stress is crucial to its effectiveness as a biocontrol agent. This study elucidated potassium’s role and mechanism of action in enabling the hyperosmotic tolerance of <em>P. protegens</em>. Potassium was observed to significantly improve the growth of <em>P. protegens</em> under hyperosmotic conditions. Four functionally redundant potassium transporters, KdpA1, KdpA2, TrkH, and Kup, were identified in <em>P. protegens</em>, of which KdpA2 and TrkH were particularly important for its growth under hyperosmotic conditions. Potassium enhanced the biofilm formation and cell membrane stability of <em>P. protegens</em> under hyperosmotic conditions. In addition, we revealed that K⁺ stimulates the expression of several genes related to DNA damage repair in <em>P. protegens</em> under hyperosmotic conditions. Further experiments revealed that the DNA repair-related <em>recG</em> induced by potassium contributes to <em>P. protegens</em>’ hyperosmotic tolerance. We also found that the sigma factor RpoN participates in the hyperosmotic adaptation of <em>P. protegens</em>. Furthermore, we revealed that the <em>opuCABCD</em> operon, whose expression is induced by potassium through RpoN, serves as the key pathway through which betaine, choline, and carnitine improve the hyperosmotic tolerance of <em>P. protegens</em>.</p></div>","PeriodicalId":18564,"journal":{"name":"Microbiological research","volume":"289 ","pages":"Article 127887"},"PeriodicalIF":6.1,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142232639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Harnessing native-cryptic plasmids for stable overexpression of heterologous genes in Clostridium butyricum DSM 10702 for industrial and medical applications","authors":"Yanchao Zhang ,&nbsp;Ying Cong ,&nbsp;Tom S. Bailey ,&nbsp;Ludwig J. Dubois ,&nbsp;Jan Theys ,&nbsp;Philippe Lambin","doi":"10.1016/j.micres.2024.127889","DOIUrl":"10.1016/j.micres.2024.127889","url":null,"abstract":"<div><p><em>Clostridium butyricum</em> has emerged as a promising candidate for both industrial and medical biotechnologies, underscoring the key pursuit of stable gene overexpression in engineering <em>C. butyricum</em>. Unlike antibiotic-selective vectors, native-cryptic plasmids can be utilized for antibiotic-free expression systems in bacteria but have not been effectively exploited in <em>C. butyricum</em> to date. This study focuses on leveraging these plasmids, pCB101 and pCB102, in <em>C. butyricum</em> DSM10702 for stable gene overexpression without antibiotic selection via efficient gene integration using the SacB-based allelic exchange method. Integration of reporter IFP2.0 and glucuronidase generated sustained near-infrared fluorescence and robust enzyme activity across successive subcultures. Furthermore, successful secretion of a cellulase, Cel9M, and the human interleukin 10 from pCB102 highlights native-cryptic plasmids’ potential in conferring stable gene products for industrial and medical applications in <em>C. butyricum</em>. This work appears to be the first study to harness the <em>Clostridium</em> native-cryptic plasmid for stable gene overexpression without antibiotics, thereby advancing the biotechnological prospects of <em>C. butyricum</em>.</p></div>","PeriodicalId":18564,"journal":{"name":"Microbiological research","volume":"288 ","pages":"Article 127889"},"PeriodicalIF":6.1,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0944501324002908/pdfft?md5=ac49bfff01f7dc90c408ba08bacad085&pid=1-s2.0-S0944501324002908-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142095508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Repurposing endogenous Type I-D CRISPR-Cas system for genome editing in Synechococcus sp. PCC7002","authors":"Shuxiao Yang,&nbsp;Yongjiu Zhang,&nbsp;Chunyan Li,&nbsp;Xiaoming Tan","doi":"10.1016/j.micres.2024.127884","DOIUrl":"10.1016/j.micres.2024.127884","url":null,"abstract":"<div><p><em>Synechococcus</em> sp. PCC7002 has been considered as a photosynthetic chassis for the conversion of CO₂ into biochemicals through genetic modification. However, conventional genetic manipulation techniques prove inadequate for comprehensive genetic modifications in this strain. Here, we present the development of a genome editing tool tailored for <em>S</em>. PCC7002, leveraging its endogenous type I-D CRISPR-Cas system. Utilizing this novel tool, we successfully deleted the <em>glgA1</em> gene and iteratively edited the genome to obtain a double mutant of <em>glgA1</em> and <em>glgA2</em> genes. Additionally, large DNA fragments encompassing the entire type I-A (∼14 kb) or III-B CRISPR-Cas (∼21 kb) systems were completely knocked-out in <em>S</em>. PCC7002 using our tool. Furthermore, the endogenous pAQ5 plasmid, approximately 38 kb in length, was successfully cured from <em>S</em>. PCC7002. Our work demonstrates the feasibility of harnessing the endogenous CRISPR-Cas system for genome editing in <em>S</em>. PCC7002, thereby enriching the genetic toolkit for this species and providing a foundation for future enhancements in its biosynthetic efficiency.</p></div>","PeriodicalId":18564,"journal":{"name":"Microbiological research","volume":"288 ","pages":"Article 127884"},"PeriodicalIF":6.1,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142122274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Virulence regulation in plant-pathogenic bacteria by host-secreted signals","authors":"Muhammad Asif,&nbsp;Xin Xie,&nbsp;Zhibo Zhao","doi":"10.1016/j.micres.2024.127883","DOIUrl":"10.1016/j.micres.2024.127883","url":null,"abstract":"<div><p>Bacterial pathogens manipulate host signaling pathways and evade host defenses using effector molecules, coordinating their deployment to ensure successful infection. However, host-derived metabolites as signals, and their critical role in regulating bacterial virulence requires further insights. Effective regulation of virulence, which is essential for pathogenic bacteria, involves controlling factors that enable colonization, defense evasion, and tissue damage. This regulation is dynamic, influenced by environmental cues including signals from host plants like exudates. Plant exudates, comprising of diverse compounds released by roots and tissues, serve as rich chemical signals affecting the behavior and virulence of associated bacteria. Plant nutrients act as signaling molecules that are sensed through membrane-localized receptors and intracellular response mechanisms in bacteria. This review explains how different bacteria detect and answer to secreted chemical signals, regulating virulence gene expression. Our main emphasis is exploring the recognition process of host-originated signaling molecules through molecular sensors on cellular membranes and intracellular signaling pathways. This review encompasses insights into how bacterial strains individually coordinate their virulence in response to various distinct host-derived signals that can positively or negatively regulate their virulence. Furthermore, we explained the interruption of plant defense with the perception of host metabolites to dampen pathogen virulence. The intricate interplay between pathogens and plant signals, particularly in how pathogens recognize host metabolic signals to regulate virulence genes, portrays a crucial initial interaction leading to profound influences on infection outcomes. This work will greatly aid researchers in developing new strategies for preventing and treating infections.</p></div>","PeriodicalId":18564,"journal":{"name":"Microbiological research","volume":"288 ","pages":"Article 127883"},"PeriodicalIF":6.1,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0944501324002842/pdfft?md5=72a8c201696e6bf77a88ebaf7f4d85a9&pid=1-s2.0-S0944501324002842-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142088980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Transcriptional regulation of the anaerobic 3-hydroxybenzoate degradation pathway in Aromatoleum sp. CIB","authors":"Unai Fernández-Arévalo ,&nbsp;Jonathan Fuchs ,&nbsp;Matthias Boll ,&nbsp;Eduardo Díaz","doi":"10.1016/j.micres.2024.127882","DOIUrl":"10.1016/j.micres.2024.127882","url":null,"abstract":"<div><p>Phenolic compounds are commonly found in anoxic environments, where they serve as both carbon and energy sources for certain anaerobic bacteria. The anaerobic breakdown of <em>m</em>-cresol, catechol, and certain lignin-derived compounds yields the central intermediate 3-hydroxybenzoate/3-hydroxybenzoyl-CoA. In this study, we have characterized the transcription and regulation of the <em>hbd</em> genes responsible for the anaerobic degradation of 3-hydroxybenzoate in the β-proteobacterium <em>Aromatoleum</em> sp. CIB. The <em>hbd</em> cluster is organized in three catabolic operons and a regulatory <em>hbdR</em> gene that encodes a dimeric transcriptional regulator belonging to the TetR family. HbdR suppresses the activity of the three catabolic promoters (<em>P</em>_{<em>hbdN</em>}<em>, P</em>_{<em>hbdE</em>} and <em>P</em>_{<em>hbdH</em>}) by binding to a conserved palindromic operator box (ATGAATGAN₄TCATTCAT). 3-Hydroxybenzoyl-CoA, the initial intermediate of the 3-hydroxybenzoate degradation pathway, along with benzoyl-CoA, serve as effector molecules that bind to HbdR inducing the expression of the <em>hbd</em> genes. Moreover, the <em>hbd</em> genes are subject to additional regulation influenced by the presence of non-aromatic carbon sources (carbon catabolite repression), and their expression is induced in oxygen-deprived conditions by the AcpR transcriptional activator. The prevalence of the <em>hbd</em> cluster among members of the <em>Aromatoleum/Thauera</em> bacterial group, coupled with its association with mobile genetic elements, suggests acquisition through horizontal gene transfer. These findings significantly enhance our understanding of the regulatory mechanisms governing the <em>hbd</em> gene cluster in bacteria, paving the way for further exploration into the anaerobic utilization/valorization of phenolic compounds derived from lignin.</p></div>","PeriodicalId":18564,"journal":{"name":"Microbiological research","volume":"288 ","pages":"Article 127882"},"PeriodicalIF":6.1,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0944501324002830/pdfft?md5=badde5561632685d11a12c9bf2bd39da&pid=1-s2.0-S0944501324002830-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142095509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Delineating the soil physicochemical and microbiological factors conferring disease suppression in organic farms","authors":"Priya Chaudhary ,&nbsp;Annapurna Bhattacharjee ,&nbsp;Shivani Khatri ,&nbsp;Ram C. Dalal ,&nbsp;Peter M. Kopittke ,&nbsp;Shilpi Sharma","doi":"10.1016/j.micres.2024.127880","DOIUrl":"10.1016/j.micres.2024.127880","url":null,"abstract":"<div><p>Organic farming utilizes farmyard manure, compost, and organic wastes as sources of nutrients and organic matter. Soil under organic farming exhibits increased microbial diversity, and thus, becomes naturally suppressive to the development of soil-borne pathogens due to the latter’s competition with resident microbial communities. Such soils that exhibit resistance to soil-borne phytopathogens are called disease-suppressive soils. Based on the phytopathogen suppression range, soil disease suppressiveness is categorised as specific- or general- disease suppression. Disease suppressiveness can either occur naturally or can be induced by manipulating soil properties, including the microbiome responsible for conferring protection against soil-borne pathogens. While the induction of general disease suppression in agricultural soils is important for limiting pathogenic attacks on crops, the factors responsible for the phenomenon are yet to be identified. Limited efforts have been made to understand the systemic mechanisms involved in developing disease suppression in organically farmed soils. Identifying the critical factors could be useful for inducing disease suppressiveness in conducive soils as a cost-effective alternative to the application of pesticides and fungicides. Therefore, this review examines the soil properties, including microbiota, and assesses indicators related to disease suppression, for the process to be employed as a tactical option to reduce pesticide use in agriculture.</p></div>","PeriodicalId":18564,"journal":{"name":"Microbiological research","volume":"289 ","pages":"Article 127880"},"PeriodicalIF":6.1,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142135717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Repurposing cetylpyridinium chloride and domiphen bromide as phosphoethanolamine transferase inhibitor to combat colistin-resistant Enterobacterales","authors":"Chen Xu ,&nbsp;Qipeng Cheng ,&nbsp;Kaichao Chen ,&nbsp;Pui kin So ,&nbsp;Wenbin Jin ,&nbsp;Yanjuan Gu ,&nbsp;Iris Lai-king Wong ,&nbsp;Edward Wai Chi Chan ,&nbsp;Kwok-Yin Wong ,&nbsp;Kin Fai Chan ,&nbsp;Sheng Chen","doi":"10.1016/j.micres.2024.127879","DOIUrl":"10.1016/j.micres.2024.127879","url":null,"abstract":"<div><p>The emergence of plasmid-encoded colistin resistance mechanisms, MCR-1, a phosphoethanolamine transferase, rendered colistin ineffective as last resort antibiotic against severe infections caused by clinical Gram-negative bacterial pathogens. Through screening FDA-approved drug library, we identified two structurally similar compounds, namely cetylpyridinium chloride (CET) and domiphen bromide (DOM), which potentiated colistin activity in both colistin-resistant and susceptible Enterobacterales. These compounds were found to insert their long carbon chain to a hydrophobic pocket of bacterial phosphoethanolamine transferases including MCR-1, competitively blocking the binding of lipid A tail for substrate recognition and modification, resulting in the increase of bacterial sensitivity to colistin. In addition, these compounds were also found to dissipate bacterial membrane potential leading to the increase of bacterial sensitivity to colistin. Importantly, combinational use of DOM with colistin exhibited remarkable protection of test animals against infections by colistin-resistant bacteria in both mouse thigh infection and sepsis models. For mice infected by colistin-susceptible bacteria, the combinational use of DOM and colistin enable us to use lower dose of colistin to for efficient treatment. These properties render DOM excellent adjuvant candidates that help transform colistin into a highly potent antimicrobial agent for treatment of colistin-resistant Gram-negative bacterial infections and allowed us to use of a much lower dosage of colistin to reduce its toxicity against colistin-susceptible bacterial infection such as carbapenem-resistant Enterobacterales.</p></div>","PeriodicalId":18564,"journal":{"name":"Microbiological research","volume":"288 ","pages":"Article 127879"},"PeriodicalIF":6.1,"publicationDate":"2024-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142050288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enterobacter adelaidei sp. nov. Isolation of an extensively drug resistant strain from hospital wastewater in Australia and the global distribution of the species","authors":"Naomi L. Siderius,&nbsp;Sylvia A. Sapula,&nbsp;Bradley J. Hart,&nbsp;Joshua L. Hutchings,&nbsp;Henrietta Venter","doi":"10.1016/j.micres.2024.127867","DOIUrl":"10.1016/j.micres.2024.127867","url":null,"abstract":"<div><h3>Background</h3><p><em>Enterobacter</em> species are included among the normal human gut microflora and persist in a diverse range of other environmental niches. They have become important opportunistic nosocomial pathogens known to harbour plasmid-mediated multi-class antimicrobial resistance (AMR) determinants. Global AMR surveillance of <em>Enterobacterales</em> isolates shows the genus is second to <em>Klebsiella</em> in terms of frequency of carbapenem resistance. <em>Enterobacter</em> taxonomy is confusing and standard species identification methods are largely inaccurate or insufficient. There are currently 27 named species and a total of 46 taxa in the genus distinguishable via average nucleotide identity (ANI) calculation between pairs of genomic sequences. Here we describe an <em>Enterobacter</em> strain, ECC3473, isolated from the wastewater of an Australian hospital whose species could not be determined by standard methods nor by ribosomal RNA gene multi-locus typing.</p></div><div><h3>Aim</h3><p>To characterise ECC3473 in terms of phenotypic and genotypic antimicrobial resistance, biochemical characteristics and taxonomy as well as to determine the global distribution of the novel species to which it belongs.</p></div><div><h3>Methods</h3><p>Standard broth dilution and disk diffusion were used to determine phenotypic AMR. The strain’s complete genome, including plasmids, was obtained following long- and short read sequencing and a novel long/short read hybrid assembly and polishing, and the genomic basis of AMR was determined. Phylogenomic analysis and quantitative measures of relatedness (ANI, digital DNA-DNA hybridisation, and difference in G+C content) were used to study the taxonomic relationship between ECC3473 and <em>Enterobacter</em> type-strains. NCBI and PubMLST databases and the literature were searched for additional members of the novel species to determine its global distribution.</p></div><div><h3>Results</h3><p>ECC3473 is one of 21 strains isolated globally belonging to a novel <em>Enterobacter</em> species for which the name, <em>Enterobacter adelaidei</em> sp. nov. is proposed. The novel species was found to be resilient in its capacity to persist in contaminated water and adaptable in its ability to accumulate multiple transmissible AMR determinants.</p></div><div><h3>Conclusion</h3><p><em>E. adelaidei</em> sp. nov. may become increasingly important to the dissemination of AMR.</p></div>","PeriodicalId":18564,"journal":{"name":"Microbiological research","volume":"288 ","pages":"Article 127867"},"PeriodicalIF":6.1,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0944501324002684/pdfft?md5=0034019dfb0dc5c1f8ebf4a7d56b3a92&pid=1-s2.0-S0944501324002684-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142007098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hypervirulent and carbapenem-resistant Klebsiella pneumoniae: A global public health threat","authors":"Ting-yu Lei ,&nbsp;Bin-bin Liao ,&nbsp;Liang-Rui Yang ,&nbsp;Ying Wang ,&nbsp;Xu-bing Chen","doi":"10.1016/j.micres.2024.127839","DOIUrl":"10.1016/j.micres.2024.127839","url":null,"abstract":"<div><p>The evolution of hypervirulent and carbapenem-resistant <em>Klebsiella pneumoniae</em> can be categorized into three main patterns: the evolution of KL1/KL2-hvKp strains into CR-hvKp, the evolution of carbapenem-resistant <em>K. pneumoniae</em> (CRKp) strains into hv-CRKp, and the acquisition of hybrid plasmids carrying carbapenem resistance and virulence genes by classical <em>K. pneumoniae</em> (cKp). These strains are characterized by multi-drug resistance, high virulence, and high infectivity. Currently, there are no effective methods for treating and surveillance this pathogen. In addition, the continuous horizontal transfer and clonal spread of these bacteria under the pressure of hospital antibiotics have led to the emergence of more drug-resistant strains. This review discusses the evolution and distribution characteristics of hypervirulent and carbapenem-resistant <em>K. pneumoniae</em>, the mechanisms of carbapenem resistance and hypervirulence, risk factors for susceptibility, infection syndromes, treatment regimens, real-time surveillance and preventive control measures. It also outlines the resistance mechanisms of antimicrobial drugs used to treat this pathogen, providing insights for developing new drugs, combination therapies, and a \"One Health\" approach. Narrowing the scope of surveillance but intensifying implementation efforts is a viable solution. Monitoring of strains can be focused primarily on hospitals and urban wastewater treatment plants.</p></div>","PeriodicalId":18564,"journal":{"name":"Microbiological research","volume":"288 ","pages":"Article 127839"},"PeriodicalIF":6.1,"publicationDate":"2024-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141978968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}