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Drug Resistance and Antimicrobial Activities of Natural Products

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Natural Products Chemistry".

Deadline for manuscript submissions: 30 June 2026 | Viewed by 828

Special Issue Editors


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Guest Editor
Department of Microbiology, Ludwik Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, 9 Maria Curie Skłodowska Str., PL-85-094 Bydgoszcz, Poland
Interests: antimicrobial actions; bacterial biofilm; one health; pheno- and genothypic characterisitic of microorganisms; ESKAPE group bacteria
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Department of Microbiology, Ludwik Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, 9 Maria Curie Skłodowska Str., PL-85-094 Bydgoszcz, Poland
Interests: ESKAPE pathogens; Listeria monocytogenes; Enterococcus spp.; antibacterial activity of different agents; bacterial biofilms; molecular microbiology; virulence factors of microorganisms; genetic diversity of microorganism isolated from different source
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Antimicrobial resistance (AMR) is an urgent global health challenge that increasingly undermines the effectiveness of current therapies. Natural products—from plants, fungi, bacteria, marine organisms, and animal-derived metabolites—remain a rich and underexploited source of structurally diverse scaffolds and novel mechanisms of action that can help address drug-resistant pathogens.

This Special Issue ‘Drug Resistance and Antimicrobial Activities of Natural Products’ seeks high-quality original research articles and critical reviews that advance our understanding of how natural molecules and extracts can prevent, circumvent, or reverse antimicrobial resistance. We welcome studies on discovery and bioassay-guided isolation, chemical characterization and structure–activity relationships, modes of antimicrobial and antivirulence action (including antibiofilm and anti-persister activity), resistance development and genetic responses, and strategies to enhance efficacy such as synergistic combinations, formulation, and targeted delivery. 

Typical topics include, but are not limited to, the following:

  • Discovery and characterization of antimicrobial natural products;
  • Mechanisms of action and resistance;
  • Synergy with existing antibiotics and antivirulence approaches;
  • Antibiofilm and anti-persister strategies;
  • Biotechnological production, semisynthesis and drug-delivery systems.

The submitted manuscripts should follow the journal’s standard peer-review process and present clear experimental design, rigorous antimicrobial testing (including resistance and tolerance assays where appropriate), and discussion of translational potential. We invite authors from natural-product chemistry, microbiology, pharmacology, and related disciplines to submit their latest findings. 

Dr. Krzysztof Skowron
Dr. Katarzyna Grudlewska-Buda
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 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. Molecules is an international peer-reviewed open access semimonthly 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

  • natural products
  • antimicrobial resistance
  • antibiofilm activity
  • synergy
  • drug discovery

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Published Papers (1 paper)

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Research

12 pages, 255 KB  
Article
Cannabidiol (CBD) and Other Cannabinoids as a Promising Alternative Antibacterial Agent—Pilot Study on Enterococcus faecalis and Enterococcus faecium Clinical Strains
by Zuzanna Kraszewska, Katarzyna Grudlewska-Buda, Kacper Wnuk, Ewa Wałecka-Zacharska, Eugenia Gospodarek-Komkowska and Krzysztof Skowron
Molecules 2026, 31(1), 144; https://doi.org/10.3390/molecules31010144 - 1 Jan 2026
Viewed by 603
Abstract
Gram-positive cocci of the Enterococcus genus, despite their prevalence in the environment and the microbiota of healthy people, have become a serious threat in hospitals as opportunistic pathogens. These bacteria have many virulence factors and intrinsic resistance to existing drugs, which significantly narrows [...] Read more.
Gram-positive cocci of the Enterococcus genus, despite their prevalence in the environment and the microbiota of healthy people, have become a serious threat in hospitals as opportunistic pathogens. These bacteria have many virulence factors and intrinsic resistance to existing drugs, which significantly narrows the group of effective antimicrobials. Due to the spread of Multi-Drug-Resistant (MDR) strains, there is a need to search for new substances as potential antibiotics. Our work aimed to evaluate the antimicrobial effect of commercially available products (five oils containing cannabidiol (CBD) and its derivatives and one 99% CBD product in the form of crystals) on 20 clinical strains of E. faecalis and E. faecium. We determined the Minimal Inhibitory Concentration (MIC) of CBD oils using the microdilution method in Mueller–Hinton broth (MHB). The CBD displayed antibacterial properties against all tested Enterococcus spp. strains (MIC ≤ 1 μg/mL). The higher concentration of CBD resulted in a larger antibacterial effect. The obtained MICs of pure CBD and CBD crystals were statistically lower (W = 97, p < 0.001) for E. feacium than E. faecalis. This work confirms the antibacterial activity of CBD on Enterococcus spp., providing a solid basis for further research that can help identify new therapeutic options and gain a deeper understanding of the CBD mechanism of action. Full article
(This article belongs to the Special Issue Drug Resistance and Antimicrobial Activities of Natural Products)
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