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Microorganisms
Special Issues
Emerging Pathogen Infections and Host Immune
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Emerging Pathogen Infections and Host Immune

A special issue of Microorganisms (ISSN 2076-2607). This special issue belongs to the section "Molecular Microbiology and Immunology".

Deadline for manuscript submissions: 31 July 2026 | Viewed by 1382

Special Issue Editor

Dr. Barbara Camilloni

E-Mail Website
Guest Editor
Department of Medicine and Surgery, Microbiology and Clinical Microbiology, Santa Maria Della Misericordia” Hospital, University of Perugia, 06129 Perugia, Italy
Interests: clinical microbiology; SARS-CoV-2; molecular epidemiology; infection; diagnosis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Emerging infectious diseases constitute one of the most significant health and security challenges facing the world today. Many factors influence the emergence and spread of these pathogens, including climate change, man's encroachment into new environments, patterns of travel and migration, and deliberate dissemination. In addition to the characteristics of emerging pathogens, further knowledge of the immunological defenses and pathological responses employed by the host to fight such pathogens is needed.

The aim of this Special Issue is to provide a collection of articles that showcase the current issues in the research of “Emerging Pathogen Infections and Host Immune”. As the Guest Editor of this Special Issue, I invite you to submit research articles, review articles, and short communications related to the immunological defenses and pathological responses to emerging pathogens.

Dr. Barbara Camilloni
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-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

  • emerging pathogens
  • pathogen-associated molecular patterns
  • virulence factors
  • innate immunity
  • cellular response
  • humoral response
  • immunocompromised host

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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

10 pages, 1338 KB  
Article
Moraxella osloensis Isolated from the Intraoperative Field After Reverse Total Shoulder Arthroplasty
by Enrico Bellato, Fabio Longo, Francesca Menotti, Claudia Pagano, Antonio Curtoni, Alessandro Bondi, Filippo Castoldi, Giuliana Banche and Valeria Allizond
Microorganisms 2025, 13(12), 2699; https://doi.org/10.3390/microorganisms13122699 - 26 Nov 2025
Viewed by 312
Abstract
Moraxella osloensis is an infrequently reported component of the human skin microbiota, but it has recently been recognized as a potential source of intraoperative contamination. Its pathogenic role remains poorly defined, particularly in shoulder arthroplasty. This study describes the recovery and characterization of [...] Read more.
Moraxella osloensis is an infrequently reported component of the human skin microbiota, but it has recently been recognized as a potential source of intraoperative contamination. Its pathogenic role remains poorly defined, particularly in shoulder arthroplasty. This study describes the recovery and characterization of M. osloensis from intraoperative periprosthetic tissue samples collected immediately after reverse total shoulder arthroplasty in five patients. All isolates exhibited low colony counts (10–50 CFU/mL), were uniformly susceptible to the antimicrobial agents tested, and did not produce β-lactamases. Biofilm formation—an important virulence determinant in periprosthetic joint infections—was detected in two of the five isolates. Clinically, no patient developed postoperative infection within 12 months, and only one experienced a transient superficial wound-healing delay, which resolved with a short administration of oral antibiotics. These findings indicate that M. osloensis may be present in the operative field despite stringent skin preparation and aseptic protocols, likely reflecting endogenous colonization rather than environmental contamination. Although its clinical impact appears limited in this context, the bacteria’s biofilm-forming potential and underrecognized presence in the operating room underscore the importance of continued surveillance and careful interpretation when isolated from surgical specimens. Full article
(This article belongs to the Special Issue Emerging Pathogen Infections and Host Immune)
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17 pages, 2928 KB  
Article
Functions of the Three Common Fungal Extracellular Membrane (CFEM) Domain-Containing Genes of Arthrobotrys flagrans in the Process of Nematode Trapping
by Tingting Shi, Xiaotong Deng, Yu Zhang and Guohong Li
Microorganisms 2025, 13(9), 2001; https://doi.org/10.3390/microorganisms13092001 - 27 Aug 2025
Viewed by 831
Abstract
Arthrobotrys flagrans, a typical nematode-trapping fungus (NTF) that produces a three-dimensional adhesive network to capture nematodes, has excellent potential for the development of biocontrol agents against both plant and animal parasitic nematodes. Proteins containing the common fungal extracellular membrane (CFEM) domain are [...] Read more.
Arthrobotrys flagrans, a typical nematode-trapping fungus (NTF) that produces a three-dimensional adhesive network to capture nematodes, has excellent potential for the development of biocontrol agents against both plant and animal parasitic nematodes. Proteins containing the common fungal extracellular membrane (CFEM) domain are important for the nematodes’ trapping by A. flagrans. The loss of AfCFEM1 and AfCFEM3 resulted in a significant upregulation of proteins associated with fungal pathogenicity, forming a denser adhesive material on the trap surface and ultimately increasing nematode mortality. However, the disruption of AfCFEM2 led to the opposite result. Furthermore, the deletion of AfCFEM1-3 not only affected trap morphology, resulting in an increased proportion of irregular traps (i.e., trap cells not fused to the hyphae), but also led to a thinner cell wall of the traps. In addition, the compensatory effects among the CFEM family and other families were demonstrated. This study revealed that the AfCFEM1-3 genes in A. flagrans participated in the formation of traps, adhesive material and cell wall, and pathogenicity, providing new insights into the functions of AfCFEM in the process of nematode trapping by NTF. Full article
(This article belongs to the Special Issue Emerging Pathogen Infections and Host Immune)
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