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Cellular Effects115 citations

Bacterial response to the exposure of 50 Hz electromagnetic fields

No Effects Found

Authors not listed · 2008

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Power line frequency EMF causes measurable stress responses in bacteria, indicating biological activity at environmentally relevant exposure levels.

Plain English Summary

Summary written for general audiences

Researchers exposed E. coli bacteria to 50 Hz electromagnetic fields (the same frequency as power lines) at various intensities for up to 2 hours. While the bacteria survived normally, they showed signs of stress including changed cell shapes, clustering behavior, and altered gene activity. This suggests that power line frequency EMF acts as a biological stressor even in simple organisms.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 50 Hz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 50 HzCell phones~1 GHzWiFi2.4 GHz5G mm28 GHzLogarithmic scale
Cite This Study
Unknown (2008). Bacterial response to the exposure of 50 Hz electromagnetic fields.
Show BibTeX
@article{bacterial_response_to_the_exposure_of_50_hz_electromagnetic_fields_ce3980,
  author = {Unknown},
  title = {Bacterial response to the exposure of 50 Hz electromagnetic fields},
  year = {2008},
  doi = {10.1002/bem.20391},
  
}
DOI: 10.1002/bem.20391PubMed: 18175330

Quick Questions About This Study

Yes, exposure to 50 Hz EMF for 20-120 minutes caused E. coli bacteria to develop abnormal coccoid (spherical) shapes and form clusters. Some bacteria also showed lengthened forms suggesting disrupted cell division processes.
Interestingly, bacteria showed increased viability after being removed from 50 Hz electromagnetic field exposure and allowed to recover for 24 hours, compared to unexposed control bacteria.
The study tested 0.1, 0.5, and 1.0 millitesla (mT) magnetic fields at 50 Hz frequency. All intensities produced changes in bacterial RNA patterns, indicating altered gene expression at each strength level.
No direct DNA damage was observed in the genetic fingerprinting analysis. However, changes in RNA patterns suggested that gene expression was altered without permanent genetic mutations occurring.
Bacterial morphological changes occurred after just 20-120 minutes of 50 Hz electromagnetic field exposure, with the most pronounced effects visible after 24 hours of recovery outside the field.