Inhibition of Bacterial Growth by Magnetic Fields

Gerencser, Vincent F.; Barnothy, M. F.; Barnothy, J. M.

doi:10.1038/196539a0

Cited by 61 publications

(11 citation statements)

References 1 publication

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“…This can be attributed to the low positive response or reaction of the organism to the magnetic field. This finding is in agreement with the submissions of Gerencer et al (1962) that S. marcescens exhibits an initial small or nil response to both static and heterogeneous magnetic fields but upon further exposure may be slightly stimulated in terms of growth or other properties.…”

Section: Discussionsupporting

confidence: 92%

Variability of the potency of some selected entomopathogenic bacteria (Bacillus spp. and Serratia spp.) on termites, Macrotermes bellicosus (Isoptera: Termitidae) after exposure to magnetic fields

Omoya

Kelly

2014

Int. J. Trop. Insect Sci.

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In this study, the effect of exposing entomopathogenic bacteria isolated from macerated termite cadavers to varying intensities of a magnetic field for different periods of time on their pathogenic potential was examined; pathogenicity tests were carried out for each of the bacterial species. Two of the bacteria, Bacillus subtilis (Ehrenberg) Cohn and Serratia marcescens Bizio, were able to induce morbid effects on termites and both were re-isolated from the resulting cadavers. Reinfection using different concentrations of both bacteria was carried out on termites to determine the minimum lethal concentration required for pathogenicity. Bacillus subtilis was able to degenerate the termites at concentration values of 10 8 colony-forming units (cfu)/ml and S. marcescens at 10 7 cfu/ml. Both bacteria were then exposed to magnetic fields of different intensities for different periods of time, after which they were used for reinfection of healthy termites. Postinfection study after the exposure of termites to magnetic field-treated bacterial cells revealed no reduction in the entomopathogenic potency of S. marcescens. As the extensive use of chemicals to control insect pests has been found to have detrimental effects on people and the environment, there is a pressing need to discover and develop new entomopathogens to control these insects biologically. Therefore, bacteria discovered in this study to have entomopathogenic potency against termites may be further studied and formulated into either powdery forms or suspensions to be applied to infested wood or wood products.

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Section: Discussionsupporting

confidence: 92%

Variability of the potency of some selected entomopathogenic bacteria (Bacillus spp. and Serratia spp.) on termites, Macrotermes bellicosus (Isoptera: Termitidae) after exposure to magnetic fields

Omoya

Kelly

2014

Int. J. Trop. Insect Sci.

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“…The influence of static magnetic fields was also investigated. Gerencser et al [1962] demonstrated reduced bacterial growth of Staphylococci and Serratia marsecens following exposure to static magnetic fields. However, Kohno et al [2000] could not detect any inhibition in E. coli exposed to static magnetic fields.…”

Section: Discussionmentioning

confidence: 98%

Growth inhibition of Staphylococcus aureus induced by low‐frequency electric and electromagnetic fields

Obermeier

Matl

Frieß

et al. 2009

Bioelectromagnetics

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Magnetic field therapy is an established technique in the treatment of pseudarthrosis. In cases of osteomylitis, palliation is also observed. This study focuses on the impact of different electric and electromagnetic fields on the growth of Staphylococcus aureus by in vitro technologies. Cultures of Staphylococcus aureus in fluid and gel-like medium were exposed to a low-frequency electromagnetic field, an electromagnetic field combined with an additional electric field, a sinusoidal electric field and a static electric field. In gel-like medium no significant difference between colony-forming units of exposed samples and non-exposed references was detected. In contrast, Staphylococcus aureus concentrations in fluid medium could clearly be reduced under the influence of the four different applied fields within 24 h of experiment. The strongest effects were observed for the direct current electric field which could decrease CFU/ml of 37%, and the low-frequency electromagnetic field with additional induced electric alternating field with a decrease of Staphylococci concentration by 36%. The effects of the electromagnetic treatment on Staphylococci within fluid medium are significantly higher than in gel-like medium. The application of low-frequency electromagnetic fields corroborates clinical situations of bone infections during magnetic field therapy.

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“…Gerencser et al 5 have shown that bacterial growth is inhibited in a Ðeld of high paramagnetic strength. It has been shown that acclimating microorganisms to a given toxic chemical can have a positive e †ect on the treatment of that chemical.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of phenol biodegradation by south magnetic field exposure

Jung¹,

Sofer

1997

J. Chem. Technol. Biotechnol.

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: Microbial pellets in the presence of south pole magnetic Ðelds demonstrate enhanced oxidation of phenol. Earlier work at 0É49 tesla indicates qualitatively that a unipolar north magnetic Ðeld inhibits and a south magnetic Ðeld accelerates phenol oxidation rates of an alginate immobilized, mixed bacterial culture bioreactor. This work demonstrates further enhancement by exposure during phenol oxidation at 0É15 and 0É35 tesla, as well as by exposure during acclimation of the free microorganisms prior to immobilization. The enhancement of biodegradation is a function of magnetic Ðeld strength and time of exposure. Enhancement is greatest at 0É15 tesla and indicates the existence of an optimum south magnetic Ðeld strength

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Inhibition of Bacterial Growth by Magnetic Fields

Cited by 61 publications

References 1 publication

Variability of the potency of some selected entomopathogenic bacteria (Bacillus spp. and Serratia spp.) on termites, Macrotermes bellicosus (Isoptera: Termitidae) after exposure to magnetic fields

Variability of the potency of some selected entomopathogenic bacteria (Bacillus spp. and Serratia spp.) on termites, Macrotermes bellicosus (Isoptera: Termitidae) after exposure to magnetic fields

Growth inhibition of Staphylococcus aureus induced by low‐frequency electric and electromagnetic fields

Enhancement of phenol biodegradation by south magnetic field exposure

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