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7.4
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Journals
Microorganisms
Special Issues
Novel Antimicrobial Strategies
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Novel Antimicrobial Strategies

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

Deadline for manuscript submissions: 15 May 2025 | Viewed by 1910

Special Issue Editors

Prof. Dr. Evandro Watanabe

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Guest Editor
Department of Restorative Dentistry, Ribeirão Preto School of Dentistry, University of São Paulo, São Paulo 14040-904, Brazil
Interests: worker's health; antimicrobial activity; biofilm in healthcare; biomaterials with applicability in human health; biosafety; microorganisms of health and dental interest; sustainability and environmental education
Dr. Denise De Andrade

E-Mail Website
Guest Editor
Department of General and Specialized Nursing, WHO Collaborating Centre for Nursing Research Development, Ribeirão Preto College of Nursing, University of São Paulo, São Paulo 14040-902, Brazil
Interests: infectious diseases
Prof. Dr. Cláudia Helena Silva-Lovato

E-Mail Website
Guest Editor
Department of Dental Materials and Prostheses, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo 14040-904, Brazil
Interests: biofilm in dental prosthesis; dental prosthesis sanitizers; maxillofacial prosthesis; acrylic resin; silicone
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Science and technology based on novel antimicrobial strategies with the use of protocols and/or products for the control of microorganisms resistant and/or tolerant to physical and/or chemical agents are fundamental in the advancement of scientific knowledge, using integrated and unified approaches, aiming at the balance and optimization of the health of people, animals, plants, and the environment. Thus, this Special Issue aims to showcase studies that propose novel antimicrobial strategies to control the challenges related to multidrug-resistant microorganisms and the problem of biofilm tolerance to physical and chemical agents in different areas of knowledge.

Prof. Dr. Evandro Watanabe
Dr. Denise De Andrade
Prof. Dr. Cláudia Helena Silva-Lovato
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

  • anti-infective agents
  • bacteriophages
  • biocompatible materials
  • biofilms
  • biological products
  • multidrug resistance
  • environmental health
  • equipment contamination
  • infections
  • materials testing
  • volatile oils
  • probiotics
  • technology

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Published Papers (2 papers)

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Research

15 pages, 11302 KiB  
Article
Ultrasound Treatment Combined with Rhamnolipids for Eliminating the Biofilm of Bacillus cereus
by Ben Niu, Yiming Sun, Yongwu Niu and Shan Qiao
Microorganisms 2024, 12(12), 2478; https://doi.org/10.3390/microorganisms12122478 - 2 Dec 2024
Viewed by 781
Abstract
Biofilm formation by Bacillus cereus is a major cause of secondary food contamination, leading to significant economic losses. While rhamnolipids (RLs) have shown effectiveness against Bacillus cereus, their ability to remove biofilms is limited when used alone. Ultrasound (US) is a non-thermal [...] Read more.
Biofilm formation by Bacillus cereus is a major cause of secondary food contamination, leading to significant economic losses. While rhamnolipids (RLs) have shown effectiveness against Bacillus cereus, their ability to remove biofilms is limited when used alone. Ultrasound (US) is a non-thermal sterilization technique that has been found to enhance the delivery of antimicrobial agents, but it is not highly effective on its own. In this study, we explored the synergistic effects of combining RLs with US for biofilm removal. The minimum biofilm inhibitory concentration (MBIC) of RLs was determined to be 32.0 mg/L. Using a concentration of 256.0 mg/L, RLs alone achieved a biofilm removal rate of 63.18%. However, when 32.0 mg/L RLs were combined with 20 min of US treatment, the removal rate increased to 62.54%. The highest biofilm removal rate of 78.67% was observed with 256.0 mg/L RLs and 60 min of US exposure. Scanning electron microscopy analysis showed that this combined treatment significantly disrupted the biofilm structure, causing bacterial deformation and the removal of extracellular polymeric substances. This synergistic approach not only inhibited bacterial metabolic activity, aggregation, and adhesion but also reduced early biofilm formation and decreased levels of extracellular polysaccharides and proteins. Furthermore, US treatment improved biofilm permeability, allowing better penetration of RLs and interaction with bacterial DNA, ultimately inhibiting DNA synthesis and secretion. The combination of RLs and US demonstrated superior biofilm removal efficacy, reduced the necessary concentration of RLs, and offers a promising strategy for controlling biofilm formation in the food industry. Full article
(This article belongs to the Special Issue Novel Antimicrobial Strategies)
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11 pages, 2740 KiB  
Article
Probiotic Mixtures Consisting of Representatives of Bacteroidetes and Selenomonadales Increase Resistance of Newly Hatched Chicks to Salmonella Enteritidis Infection
by Jiri Volf, Marcela Faldynova, Jitka Matiasovicova, Alena Sebkova, Daniela Karasova, Hana Prikrylova, Hana Havlickova and Ivan Rychlik
Microorganisms 2024, 12(11), 2145; https://doi.org/10.3390/microorganisms12112145 - 25 Oct 2024
Viewed by 830
Abstract
There are extensive differences in the caecal microbiota of chicks from hatcheries and those inoculated with faecal material from adult hens. Besides differences in microbial composition, the latter chickens are highly resistant to Salmonella Enteritidis challenges, while the former are susceptible. In this [...] Read more.
There are extensive differences in the caecal microbiota of chicks from hatcheries and those inoculated with faecal material from adult hens. Besides differences in microbial composition, the latter chickens are highly resistant to Salmonella Enteritidis challenges, while the former are susceptible. In this study, we tested whether strains from genera Bacteroides, Megamonas, or Megasphaera can increase chicken resistance to Salmonella and Campylobacter jejuni when defined microbial mixtures consisting of these bacterial genera are administered. Mixtures consisting of different species and strains from the above-mentioned genera efficiently colonised the chicken caecum and increased chicken resistance to Salmonella by a factor of 50. The tested mixtures were even more effective in protecting chickens from Salmonella in a seeder model of infection (3–5 log reduction). The tested mixtures partially protected chickens from C. jejuni infection, though the effect was lower than that against Salmonella. The obtained data represent a first step for the development of a new type of probiotics for poultry. Full article
(This article belongs to the Special Issue Novel Antimicrobial Strategies)
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