Advances in Microbial Pathogenesis and Host Responses

A special issue of Microorganisms (ISSN 2076-2607). This special issue belongs to the section "Public Health Microbiology".

Deadline for manuscript submissions: 31 July 2024 | Viewed by 875

Special Issue Editors


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Guest Editor
Department of Experimental Medicine, University of Campania "Luigi Vanvitelli", Naples, Italy
Interests: microbiology; bacteria; fungi; biofilm; host-pathogen interactions; innate immunityantimicrobial peptides; microbiota; probiotics
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Dipartimento di Medicina Sperimentale, Università degli Studi della Campania "Luigi Vanvitelli", Naples, Italy
Interests: microbiology; biofilm; microbial pathogenesis; immunomodulation; antimicrobial peptides; microbiota; probiotics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Medical and biological studies are continuously focused on the search for efficient strategies able to reduce the incidence of traditional infectious diseases, as well as emerging and re-emerging infections, to improve the individuals’ health and quality of life worldwide and to reduce problems affecting the public health system.

However, despite many successes in this field, infectious diseases still pose a serious threat to public health globally, particularly in low- and middle-income countries; one of the main causes is the continuous expansion of antibiotic resistance phenomena, but in recent years, it has been highlighted that climate change and human mobility are also able to increase the rate of microbial and zoonotic infections. In addition, it has been increasingly established that many microorganisms are associated with or predispose people to the pathogenesis of various chronic diseases, including cancers.

The mechanisms of microbial pathogenesis are significantly influenced by the host response.

Host–pathogen interaction is a highly dynamic process between different microbial pathogens and hosts at all stages of pathogenic infection, from invasion to spread. Following pathogenic infection, the innate immune system responds to pathogen-associated molecular patterns and activates immediate host inflammatory and antimicrobial responses.

Innate host immune activation results in the production of multiple effective molecules, including cytokines and chemokines, as well as antimicrobial proteins, to fight off invading pathogens and parasites; however, many intracellular pathogens employ a variety of evolved strategies to escape, modulate, and hijack host immunity during infection.

In this scenario, it is crucial that we improve our knowledge of both the mechanisms of microbial pathogenicity and the host–pathogen interaction, and investigate the role of the microbiome in health and disease; this is in order to gain new insights into the identification of novel targets for host effectors and microbial virulence factors, and to develop new therapeutic strategies and solutions against microbial infections.

In this Special Issue, we intend to invite front-line researchers and authors to submit original research and review articles on advances in microbial pathogenesis and the host response.

Dr. Alessandra Fusco
Dr. Giovanna Donnarumma
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

  • microbial infections
  • pathogenesis
  • microbiota
  • immune response
  • host-pathogen interactions
  • antibiotic resistance
  • clinical microbiology
  • public health
  • drug development
  • new therapeutic strategies

Published Papers (1 paper)

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Research

15 pages, 4274 KiB  
Article
Pathological Responses in Asian House Shrews (Suncus murinus) to the Naturally Acquired Orientia tsutsugamushi Infection
by Tharani Balasubramanian, Uma Sambath, Ranjana Devi Radja, Gowdham Thangaraj, Panneer Devaraju, Lakshmy Srinivasan, Pushpa Srinivasan, Madhavan Gopalakrishnan Nair, Kumar Raja, Avinash Warundeo Lakkawar and Lynn Soong
Microorganisms 2024, 12(4), 748; https://doi.org/10.3390/microorganisms12040748 - 07 Apr 2024
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Abstract
Scrub typhus is a re-emerging disease caused by Orientia tsutsugamushi, transmitted by mites belonging to the family Trombiculidae. Humans and rodents acquire the infection by the bite of larval mites/chiggers. Suncus murinus, the Asian house shrew, has been reported to [...] Read more.
Scrub typhus is a re-emerging disease caused by Orientia tsutsugamushi, transmitted by mites belonging to the family Trombiculidae. Humans and rodents acquire the infection by the bite of larval mites/chiggers. Suncus murinus, the Asian house shrew, has been reported to harbor the vector mites and has been naturally infected with O. tsutsugamushi. The present study aimed to localize and record O. tsutsugamushi in the tissues and the host response in shrews naturally infected with O. tsutsugamushi. Sheehan’s modified May–Grunwald Giemsa staining was carried out in 365 tissues from 87 animals, and rickettsiae were documented in 87 tissues from 20 animals. Immunohistochemical (IHC) staining, using polyclonal antibodies raised against selected epitopes of the 56-kDa antigen, was carried out, and 81/87 tissue sections were tested positive for O. tsutsugamushi. By IHC, in addition to the endothelium, the pathogen was also demonstrated by IHC in cardiomyocytes, the bronchiolar epithelium, stroma of the lungs, hepatocytes, the bile duct epithelium, the epithelium and goblet cells of intestine, the tubular epithelium of the kidney, and splenic macrophages. Furthermore, the pathogen was confirmed by real-time PCR using blood (n = 20) and tissues (n = 81) of the IHC-positive animals. None of the blood samples and only 22 out of 81 IHC-positive tissues were tested positive by PCR. By nucleotide sequencing of the 56-kDa gene, Gilliam and Karp strains were found circulating among these animals. Although these bacterial strains are highly virulent and cause a wide range of pathological alterations, hence exploring their adaptive mechanisms of survival in shrews will be of significance. Given that the pathogen localizes in various organs following a transient bacteremia, we recommend the inclusion of tissues from the heart, lung, intestine, and kidney of reservoir animals, in addition to blood samples, for future molecular surveillance of scrub typhus. Full article
(This article belongs to the Special Issue Advances in Microbial Pathogenesis and Host Responses)
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