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Microorganisms
Special Issues
Selected Papers from the 3rd International Electronic Conference on Microbiology...
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Selected Papers from the 3rd International Electronic Conference on Microbiology (ECM 2025)

A special issue of Microorganisms (ISSN 2076-2607).

Deadline for manuscript submissions: 31 December 2025 | Viewed by 2256

Special Issue Editors

Dr. Nico Jehmlich

E-Mail Website
Guest Editor
Department of Molecular Toxicology, UFZ-Helmholtz Centre for Environmental Research, 04318 Leipzig, Germany
Interests: metaproteomics; protein-stable isotope probing; microbiome biology; environmental microbiology
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Theodoros Varzakas

E-Mail Website
Guest Editor
Department of Food Science and Technology, University of Peloponnese, 24100 Antikalamos, Greece
Interests: food technology; food engineering; food safety; food quality; extra virgin olive oil; mycotoxins; fermented foods
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Ute Römling

E-Mail Website
Guest Editor
Department of Microbiology, Tumor and Cell Biology (MTC), Karolinska Institutet, Stockholm, Sweden
Interests: microbial biofilm formation; cyclic di-nucleotide signaling; pathogen-host interaction; protein quality control; Salmonella typhimurium; Pseudomonas aeruginosa; Candida parapsilosis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue, titled "Selected Papers from the 3rd International Electronic Conference on Microbiology (ECM 2025)", will present the latest research on prokaryotic and eukaryotic microorganisms, viruses, and prions. Topics of interest include, but are not limited to, the following:

  • S1. Gut Microbiota and Health Disease;
  • S2. Foodborne Pathogens and Food Safety;
  • S3. Antimicrobial Agents and Resistance;
  • S4. Emerging Infectious Diseases;
  • S5. Microbiome and Soil Science;
  • S6. Microbial Characterization and Bioprocess
  • S7. Microbe-Plant Interactions

We are cooperating with the 3rd International Electronic Conference on Microbiology (ECM 2025). Registered conference participants are invited to submit their manuscripts to be considered for publication. Authors may contribute an original research article or review in areas related to the conference themes.

Dr. Nico Jehmlich
Prof. Dr. Theodoros Varzakas
Prof. Dr. Ute Römling
Guest Editors

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 100 words) can be sent to the Editorial Office for announcement on this website.

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-blind 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

  • gut microbiota
  • foodborne pathogens and food safety
  • antimicrobial agents and resistance
  • emerging infectious diseases
  • microbiome and soil science
  • microbial characterization and bioprocess
  • microbe-plant interactions

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

Published Papers (3 papers)

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Research

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10 pages, 3265 KB  
Communication
Human Herpesvirus 6 Activates NF-κB Signalling and CD163-Positive Macrophage Recruitment in Alcohol-Induced Hepatic Injury
by Anda Upane, Simons Svirskis, Valerija Groma and Sandra Skuja
Microorganisms 2025, 13(9), 2204; https://doi.org/10.3390/microorganisms13092204 - 20 Sep 2025
Viewed by 137
Abstract
Human herpesvirus 6 (HHV-6) establishes lifelong latency in immune cells and may contribute to the progression of ethanol-induced liver injury. To elucidate the contribution of HHV-6 to alcohol-induced hepatic injury, this study evaluated HHV-6 protein expression, NF-κB signalling, and CD163-positive macrophage recruitment in [...] Read more.
Human herpesvirus 6 (HHV-6) establishes lifelong latency in immune cells and may contribute to the progression of ethanol-induced liver injury. To elucidate the contribution of HHV-6 to alcohol-induced hepatic injury, this study evaluated HHV-6 protein expression, NF-κB signalling, and CD163-positive macrophage recruitment in liver samples from control subjects, young individuals with recent alcohol exposure, and individuals with long-term chronic alcohol use. Liver lobules displaying HHV-6 positivity were more frequent in alcohol users (64% in young and 72% in chronic users) compared to controls (48%). CD163-positive macrophage counts were higher in both young and chronic alcohol users compared to controls, with the greatest increase in HHV-6-positive chronic users. NF-κB expression intensity was elevated in alcohol users (p < 0.005), and further increased in HHV-6-positive samples (p = 0.02). These findings indicate an association between HHV-6 persistence, NF-κB pathway activation, and CD163-positive macrophage-driven inflammatory responses in liver tissue under conditions of chronic alcohol use. Further research is warranted to uncover the mechanisms underlying the interaction between HHV-6 and ethanol in liver injury. Full article
(This article belongs to the Special Issue Selected Papers from the 3rd International Electronic Conference on Microbiology (ECM 2025))
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18 pages, 4478 KB  
Article
RecA Inhibitor Mitigates Bacterial Antibiotic Resistance
by Jin Ma, Liwen Xu, Keke Shang, Qing-Yu He and Gong Zhang
Microorganisms 2025, 13(9), 2087; https://doi.org/10.3390/microorganisms13092087 - 7 Sep 2025
Viewed by 398
Abstract
Bacterial antibiotic resistance (AR) has become a critical global health threat. AR is mainly driven by adaptive resistance mutations and the horizontal gene transfer of resistance genes, both of which are enhanced by genome recombination. We previously discovered that genome recombination-mediated tRNA upregulation [...] Read more.
Bacterial antibiotic resistance (AR) has become a critical global health threat. AR is mainly driven by adaptive resistance mutations and the horizontal gene transfer of resistance genes, both of which are enhanced by genome recombination. We previously discovered that genome recombination-mediated tRNA upregulation is important for AR, especially in the early stages. RecA is a crucial bacterial factor mediating genome recombination and the DNA damage response. Therefore, RecA inhibitors should be effective in reducing AR. In this study, we found that BRITE-338733 (BR), a RecA inhibitor, can prevent ciprofloxacin (CIP) resistance in subculturing Escherichia coli strain BW25113 in the early stages (up to the 7th generation). In the presence of BR, the tRNA was decreased, so the bacteria cannot evolve resistance via the tRNA upregulation-mediated AR mechanism. The RecA expression level was also not increased when treated with BR. Transcriptome sequencing revealed that BR could inhibit oxidative phosphorylation, the electron transport chain process, and translation, thereby reducing the bacterial energy state and protein synthesis. Also, the effective concentrations of BR do not harm human cell viability, indicating its clinical safety. These findings demonstrate that BR effectively delays the emergence of spontaneous AR by targeting RecA-mediated pathways. Our findings shed light on a new strategy to counteract clinical AR: applying BR with the antibiotics together at the beginning. Full article
(This article belongs to the Special Issue Selected Papers from the 3rd International Electronic Conference on Microbiology (ECM 2025))
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Other

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31 pages, 1208 KB  
Systematic Review
Exploring Methodologies from Isolation to Excystation for Giardia lamblia: A Systematic Review
by Susie Sequeira, Mariana Sousa and Agostinho Cruz
Microorganisms 2025, 13(8), 1719; https://doi.org/10.3390/microorganisms13081719 - 22 Jul 2025
Viewed by 867
Abstract
Giardia lamblia is a flagellated protozoan and the etiological agent of giardiasis, a leading cause of epidemic and sporadic diarrhoea globally. The clinical and public health relevance of giardiasis underscores the need for robust methodologies to investigate and manage this pathogen. This study [...] Read more.
Giardia lamblia is a flagellated protozoan and the etiological agent of giardiasis, a leading cause of epidemic and sporadic diarrhoea globally. The clinical and public health relevance of giardiasis underscores the need for robust methodologies to investigate and manage this pathogen. This study reviews the main methodologies described in the literature for studying the life cycle of G. lamblia, focusing on isolation, purification, axenization, excystation, and encystation. A systematic literature review was conducted following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA 2020) statement. Searches were performed in MEDLINE, ScienceDirect, and Web of Science Core Collection databases. A total of 43 studies were included, revealing 58 methods for isolation and purification, 7 for excystation, 2 for axenization, and 5 for encystation. Isolation and purification methods exhibited significant variability, often involving two phases: an initial separation (e.g., filtration and centrifugation) followed by purification using a density gradient for faecal samples or immunomagnetic separation for water samples. Method effectiveness differed depending on the sample source and type, limiting comparability across studies. In contrast, methods used for other life cycle stages were more consistent. These findings underscore the need for standardised methodologies to enhance the reproducibility and reliability of research outcomes in this field. Full article
(This article belongs to the Special Issue Selected Papers from the 3rd International Electronic Conference on Microbiology (ECM 2025))
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