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Microorganisms
Special Issues
New Crucial Pathogens and Antimicrobial Resistance in Animals, Communities, Hospitals...
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New Crucial Pathogens and Antimicrobial Resistance in Animals, Communities, Hospitals and the Environment in the One Health Context

A special issue of Microorganisms (ISSN 2076-2607). This special issue belongs to the section "Antimicrobial Agents and Resistance".

Deadline for manuscript submissions: 31 October 2026 | Viewed by 1728

Editor

Prof. Dr. Xuewen Li

E-Mail Website
Guest Editor
Department of Environment and Health, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
Interests: the prevention of drug-resistant bacteria infections and the control of drug-resistance development
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The Special Issue, entitled "New Crucial Pathogens and Antimicrobial Resistance in Animals, Communities, Hospitals and the Environment in the One Health Context", aims to present recent research on the discovery and assessment of new important pathogens and the development of antimicrobial resistance in any aspect of our living, aiming to heighten our vigilance to enable future prevention. Some of its focal points include, but are not limited to, the following:

  1. New crucial pathogens and their potential transmission among animals, humans and the environment.
  2. Future important pathogens judged by the development of enhanced resistance and spreadability.
  3. Formerly neglected pathogens becoming more serious infection risks or those with new resistant genes.
  4. The new resistance and adaptive evolution of pathogens with emerging contaminants.

Reviews, original research and communications will be welcome.

Prof. Dr. Xuewen Li
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-anonymized peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Microorganisms is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • antimicrobial resistance
  • one health
  • emerging contaminants
  • evolution
  • mutation

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

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Research

11 pages, 1007 KB  
Article
Genomic Evolution of Siccibacter colletis: Comparative Analysis and First Clinical Isolate Report
by Wentao Zhu, Qian Liu, Xi Chen, Chunxia Yang, Ming Wei, Li Gu, Hui Yuan and Hong Shen
Microorganisms 2026, 14(4), 932; https://doi.org/10.3390/microorganisms14040932 - 20 Apr 2026
Viewed by 621
Abstract
The genus Siccibacter consists primarily of environmental bacteria, with strains of Siccibacter colletis previously isolated only from plant materials and related environments. This study aims to characterize the first clinical isolate of S. colletis and explore its genomic evolution and clinical relevance. Strain [...] Read more.
The genus Siccibacter consists primarily of environmental bacteria, with strains of Siccibacter colletis previously isolated only from plant materials and related environments. This study aims to characterize the first clinical isolate of S. colletis and explore its genomic evolution and clinical relevance. Strain S25242 was isolated from the urine of a 64-year-old male with a severe urinary tract infection. The genome of S25242 is 4.19 Mb, containing 4012 coding sequences, 73 tRNAs, 10 rRNAs, and 38 snRNAs. Phylogenetic and phylogenomic analyses indicated that strain S25242 is closely related to S. colletis type strain 1383T. The strain shared >70% of digital DNA-DNA hybridization (dDDH) values and >96% of average nucleotide identity (ANI) values with the type strain of S. colletis 1383T, thereby confirming its taxonomic status. The isolate was susceptible to all 11 tested antimicrobials. Comparative genomics identified 1942 S. colletis-specific genes (including multidrug efflux systems) and 13 unique genes in S25242 related to transposition and DNA integration. This study reports the first clinical isolate of S. colletis, providing evidence that genomic plasticity facilitates its transition from an environmental inhabitant to an opportunistic pathogen. The findings highlight the need for enhanced clinical surveillance of the Siccibacter genus and offer insights into its genomic evolution and clinical adaptation. Full article
(This article belongs to the Special Issue New Crucial Pathogens and Antimicrobial Resistance in Animals, Communities, Hospitals and the Environment in the One Health Context)
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16 pages, 1296 KB  
Article
First Report and Comprehensive Risk Index of blaIMP-1-Harboring Brucella anthropi in Municipal Wastewater-Irrigated Soil
by Ling Zhao, Yanhao Wu, Runze Xu and Xuewen Li
Microorganisms 2026, 14(3), 688; https://doi.org/10.3390/microorganisms14030688 - 18 Mar 2026
Viewed by 549
Abstract
Brucella anthropi is an emerging opportunistic pathogen characterized by intrinsic resistance to most β-lactams. However, the acquisition of carbapenem resistance in this species has rarely been documented in environmental, animal, or clinical settings. In this study, a multidrug-resistant strain, SBA01, was isolated [...] Read more.
Brucella anthropi is an emerging opportunistic pathogen characterized by intrinsic resistance to most β-lactams. However, the acquisition of carbapenem resistance in this species has rarely been documented in environmental, animal, or clinical settings. In this study, a multidrug-resistant strain, SBA01, was isolated from wastewater-irrigated soil. SBA01 exhibited phenotypic resistance to carbapenems and colistin, the latter being independent of mcr genes. Genomic analysis localized blaIMP-1 on a stable 21 kb plasmid maintained by a Type II toxin–antitoxin system. While non-self-transmissible, this plasmid was mobilized to Escherichia coli and Klebsiella pneumoniae via an unclassified 50 kb helper plasmid. Additionally, a 217 kb prophage-bearing megaplasmid was identified, enhancing genomic plasticity. Genomic screening identified 32 putative virulence determinants, including markers associated with host interaction. Risk profiling indicated an elevated hazard index for SBA01, driven by the convergence of multidrug resistance, cryptic mobilization capacity, and opportunistic survival traits. These findings position B. anthropi as a resilient environmental reservoir for clinically relevant carbapenemases. Expanding surveillance frameworks to include such adaptive hosts is necessary to better evaluate potential occupational exposures at the wastewater–soil interface. Full article
(This article belongs to the Special Issue New Crucial Pathogens and Antimicrobial Resistance in Animals, Communities, Hospitals and the Environment in the One Health Context)
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