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Published on: May 8, 2020
Predatory Bacteria in the Treatment of Infectious Diseases and Beyond
Konstantinos Alexakis1, Stella Baliou2, Petros Ioannou2
1German Medical Institute, Limassol 4102, Cyprus.
Abstract:
Antimicrobial resistance (AMR) is an increasing problem worldwide, with significant associated morbidity and mortality. Given the slow production of new antimicrobials, non-antimicrobial methods for treating infections with significant AMR are required. This review examines the potential of predatory bacteria to combat infectious diseases, particularly those caused by pathogens with AMR. Predatory bacteria already have well-known applications beyond medicine, such as in the food industry, biocontrol, and wastewater treatment. Regarding their potential for use in treating infections, several in vitro studies have shown their potential in eliminating various pathogens, including those resistant to multiple antibiotics, and they also suggest minimal immune stimulation and cytotoxicity by predatory bacteria. In vivo animal studies have demonstrated safety and efficacy in reducing bacterial burden in various infection models. However, results can be inconsistent, suggesting dependence on factors like the animal model and the infecting bacteria. Until now, no clinical study in humans exists, but as experience with predatory bacteria grows, future studies including clinical studies in humans could be designed to evaluate their efficacy and safety in humans, thus leading to the potential for approval of a novel method for treating infectious diseases by bacteria.
Insights
Predatory bacteria show promise as a novel treatment for antimicrobial resistance (AMR) infections. While in vitro and animal studies demonstrate safety and efficacy, human clinical trials are needed to confirm their therapeutic potential.
Area of Science:
- Microbiology
- Infectious Diseases
- Bacteriology
Background:
- Antimicrobial resistance (AMR) poses a significant global health threat, necessitating novel therapeutic strategies.
- The development of new antibiotics is slow, creating an urgent need for alternative treatments.
- Predatory bacteria, naturally occurring microorganisms, are being explored for their potential in combating resistant infections.
Purpose of the Study:
- To review the current evidence on the use of predatory bacteria as a therapeutic approach against infectious diseases.
- To evaluate the efficacy and safety of predatory bacteria in preclinical models of antimicrobial resistance.
- To identify the challenges and future directions for the clinical application of predatory bacteria.
Main Methods:
- Literature review of in vitro and in vivo studies investigating predatory bacteria against various pathogens.
- Analysis of data on pathogen elimination, immune stimulation, cytotoxicity, and safety in animal models.
- Assessment of existing applications of predatory bacteria in non-medical fields.
Main Results:
- In vitro studies indicate predatory bacteria can eliminate multidrug-resistant pathogens with minimal cytotoxicity and immune stimulation.
- In vivo animal studies demonstrate safety and efficacy in reducing bacterial load in infection models.
- Results show variability, suggesting dependence on specific animal models and bacterial strains.
Conclusions:
- Predatory bacteria represent a promising non-antimicrobial strategy for treating infections, especially those with AMR.
- Further research, including human clinical trials, is essential to establish their safety and efficacy in clinical settings.
- Successful development could lead to a novel class of treatments for bacterial infections.
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