Antibacterial effect of a magnetic field on Serratia marcescens and related virulence to Hordeum vulgare and Rubus fruticosus callus cells

Università degli Studi di Urbino, Istituto di Chimica Biologica Giorgio Fornaini, Via Saffi 2, 61029 Urbino PU, Italy.
Comparative Biochemistry and Physiology Part B Biochemistry and Molecular Biology (Impact Factor: 1.55). 07/2002; 132(2):359-65. DOI: 10.1016/S1096-4959(02)00065-9
Source: PubMed


The exposure to a static magnetic field of 80+/-20 Gauss (8+/-2 mT) resulted in the inhibition of Serratia marcescens growth. Callus cell suspensions from Hordeum vulgare and Rubus fruticosus were also examined and only the former was found to be affected by the magnetic field, which induced a decreased viability. S. marcescens was shown to be virulent only toward H. vulgare and this virulence was reduced by the presence of the magnetic field. The modification of glutathione peroxidase activity under the different experimental conditions allowed us to speculate on the possibility of an oxidative-stress response of H. vulgare both to S. marcescens infection and magnetic field exposure. Since the control of microbial growth by physical agents is of interest for agriculture, medicine and food sciences, the investigation presented herein could serve as a starting point for future studies on the efficacy of static magnetic field as low-cost/easy-handling preservative agent.

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    • "Early investigations explored the possibility of using electromagnetic fields to eliminate P. aeruginosa (Anwar et al. 1992; Khoury et al. 1992; Benson et al. 1994). However, these studies were only conducted on planktonic phases ignoring refractory biofilms, and also failed to meet expected outcomes (Grosman et al. 1992; Piatti et al. 2002; Potenza et al. 2004; Gao et al. 2005; Laszlo & Kutasi 2010). Magnetic nanoparticles (MNP) such as iron oxides have received much attention in anti-tumor therapeutic strategies due to greater biocompatibility, low systemic toxicity, and the ability to release thermal energy in the presence of oscillating magnetic fields (Johannsen *Corresponding author. "
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    • "Several studies have been showed that low-frequency EMFs may influence plant growth and development [3] [4] [5]. Also the international discussion about the biological effects of electromagnetic fields, in which we were involved in the past [6], led us to examine the possibility of using such fields to inhibit phytoplasmas growth on plants such as lime. Phytoplasmas are endocellular prokaryotes without cell wall associated with more than 600 diseases in at least 300 plant species [7]. "
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    • "A decrease in growth rate of E. coli subjected to 50 Hz, 2 mT for 6 h was demonstrated (El-Sayed et al. 2006). Static magnetic fields were also shown to inhibit growth of bacteria (Piatti et al. 2002, Zhang et al. 2003). These and other studies prompted us to make a thorough investigation on the effects of ELF-EMF on bacteria. "
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