Thinking Out-of-the-Box: Innovative Approaches for the Treatment of Biofilm-Related Infections

A special issue of Pathogens (ISSN 2076-0817). This special issue belongs to the section "Bacterial Pathogens".

Deadline for manuscript submissions: 30 June 2025 | Viewed by 1282

Special Issue Editors


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Guest Editor
Research Laboratory for Biofilms and Implant Associated Infections (BIOFILM LAB), Experimental Orthopedics, Department of Orthopedic Surgery, Medical University of Innsbruck, 6020 Innsbruck, Austria
Interests: biofilm-related infections; smart antibiotics; antibiotic-boosting substances; carcinogenesis and biofilms; holistic management of implant-infections
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E-Mail Website
Guest Editor
Research Laboratory for Biofilms and Implant Associated Infections (BIOFILM LAB), Experimental Orthopedics, Department of Orthopedic Surgery, Medical University of Innsbruck, 6020 Innsbruck, Austria
Interests: biofilm-related infections; smart antibiotics; antibiotic-boosting substances; implant alloys; diagnostics; race-for-surface

Special Issue Information

Dear Colleagues,

Biofilm infection is one of the most frequent and severe complications associated with the use of implanted biomaterials. Implant infections count as nosocomial infections, being a major cause of death and increased morbidity among hospitalized patients. Those infections are difficult to treat, often requiring surgical implant replacement. The mortality rates for periprosthetic joint infections are equivalent to the rates for breast cancer and melanoma. The most commonly cultured microorganisms in implant infections are Coagulase-Negative Staphylococci (CoNS; primarily S. epidermidis), followed by S. aureus and mixed flora. In previous decades, commercially available antibiotics lost their activity against CoNS and several other microorganisms. CoNS of both animal and human origins represent an important reservoir of genetic elements that leads to resistance to beta-lactam antibiotics and other antibiotic classes. One additional mechanism contributing to this phenomenon and negatively affecting the antimicrobial susceptibility of CoNS is the potential of these bacteria to produce biofilms. The biofilm results in antibiotic tolerance by the bacteria because many of them cannot sufficiently penetrate through biofilms. Antibiotic-resistant bacteria like Methicillin-resistant Staphylococcus aureus (MRSA), carbapenem-resistant Enterobacteriaceae (CRE), and many more are among the biggest threats to the future of humanity, according to the WHO. There is an urgent need to investigate alternatives to antibiotic substances and novel technologies for improving the surface of implants. This Special Issue seeks manuscript submissions that “think out-of-the-box”. It would mean studies dealing with holistic approaches to treat biofilm infections, alternatives to boost antibiotic efficacy, increasing immune defenses against biofilm infections, etc. 

Prof. Dr. Débora C. Coraça-Huber
Dr. Christopher Spiegel
Guest Editors

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Keywords

  • biofilm
  • immune system
  • implant
  • PJI
  • holistic approach
  • antibiotic-boosting activity

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Published Papers (1 paper)

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Research

11 pages, 1164 KiB  
Article
Cold Plasma Activity Against Biofilm Formation of Prosthetic Joint Infection Pathogens
by Christopher Spiegel, Débora C. Coraça-Huber, Michael Nogler, Rohit Arora and David Putzer
Pathogens 2025, 14(1), 10; https://doi.org/10.3390/pathogens14010010 - 28 Dec 2024
Viewed by 933
Abstract
Periprosthetic joint infections occur in 1–2% of all patients undergoing prosthetic joint surgeries. Although strong efforts have been made to reduce infection rates, conventional therapies like one- or two-stage revisions have failed to lower the infection rates. Cold atmospheric plasma (CAP) has shown [...] Read more.
Periprosthetic joint infections occur in 1–2% of all patients undergoing prosthetic joint surgeries. Although strong efforts have been made to reduce infection rates, conventional therapies like one- or two-stage revisions have failed to lower the infection rates. Cold atmospheric plasma (CAP) has shown promising results in reducing bacterial loads on surfaces. In this study, we aimed to investigate the ability of CAP to reduce the bacterial load on metal surfaces with varying distances and different plasma compositions below a temperature suitable for in vivo applications. Methods: Biofilm was formed with Staphylococcus aureus ATCC 29213 and Staphylococcus epidermidis ATCC 12228 cultures on TMZF discs. Plasma treatments using air plasma and argon plasma were conducted on discs containing the established biofilm while the temperature was measured. During the experiments, the duration and the distance of plasma application varied. Afterwards, colony-forming units were counted. Results: The results of this study showed that air and argon plasma could be considered for applications during surgeries at a 1 cm distance. While air plasma showed the highest efficiency in CFU reduction, the temperature generation due to the presence of oxygen poses a limitation concerning the duration of application. The use of argon as a plasma generator does not show the temperature limitation in correlation to exposure time. The use of air plasma with a distance of 1 cm to the application site and an exposure time of 5 s showed the most effective bacterial reduction while not exceeding tissue-damaging temperatures. Full article
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