The effect of exposure to non-ionising radiofrequency field on Escherichia coli, Klebsiella oxytoca and Pseudomonas aeruginosa biofilms

Abstract

Overview

This study investigates how electromagnetic non-ionising radiofrequency (RF) emissions from common devices like mobile phones and Wi-Fi affect biological systems, focusing on the development of bacterial biofilms.

Findings

• The exposure of bacteria to EMFs of frequencies 1-5 GHz and 2.4 GHz over 3 or 24 hours produced varied effects on biofilm production:
• Statistically significant increases in biofilm production were seen at 1, 2, and 4 GHz, while significant reductions occurred at frequencies 3 and 5 GHz, with certain exceptions.
• Specifically, Wi-Fi operating at 2.4 GHz was found to reduce biofilm formation.
• Biofilms, which increase bacterial virulence and resistance, may respond differently based on the frequency of EMF exposure. The type of bacterial strain also affects the results.

Conclusion

EMF can either stimulate or inhibit biofilm formation in bacteria such as Escherichia coli, Klebsiella oxytoca, and Pseudomonas aeruginosa. This modulation could potentially affect pathogens' resistance, impacting treatment strategies potentially including EMF as a tool for biofilm control on medical devices. The study emphasizes the importance of recognizing the health risks associated with ubiquitous RF radiation in environments.