Low-intensity microwave radiation and the virulence of Agrobacterium tumefaciens strain B6.

PAPER pubmed Applied and environmental microbiology 1979 Animal study Effect: mixed Evidence: Low

Read original paper → DOI: 10.1128/aem.37.1.127-130.1979 PMID: 760631 Evidence Lab

Abstract

When virulent cells of Agrobacterium tumefaciens strain B6 were exposed to low-level microwave radiation at a frequency of 10,000 MHz and an intensity of 0.58 mW/cm2 for 30 to 120 min, a 30 to 60% decrease in their ability to produce tumors on potato and turnip disks was observed. This microwave exposure did not affect the viability of these bacteria or their ability to attach to a tumor-binding site nor did it induce thermal shock. This loss of virulence was reversible within 12 h.

AI evidence extraction

At a glance

Study type

Animal study

Effect direction

mixed

Population

Agrobacterium tumefaciens strain B6 (bacteria)

Sample size

—

Exposure

microwave · 10000 MHz · 30 to 120 min

Evidence strength

Low

Confidence: 78% · Peer-reviewed: yes

Main findings

Exposure to 10,000 MHz microwave radiation at 0.58 mW/cm2 for 30–120 min was associated with a 30–60% decrease in the bacteria’s ability to produce tumors on potato and turnip disks. The exposure did not affect bacterial viability or attachment to a tumor-binding site and did not induce thermal shock; the loss of virulence was reversible within 12 h.

Outcomes measured

Virulence (ability to produce tumors on potato and turnip disks)
Bacterial viability
Ability to attach to a tumor-binding site
Thermal shock (induction)
Reversibility of virulence loss within 12 h

Limitations

Sample size not reported in abstract
Mechanistic details not provided in abstract
Exposure metric reported as intensity (mW/cm2) without SAR or dosimetry details beyond frequency/intensity/duration

View raw extracted JSON

{
    "study_type": "animal",
    "exposure": {
        "band": "microwave",
        "source": null,
        "frequency_mhz": 10000,
        "sar_wkg": null,
        "duration": "30 to 120 min"
    },
    "population": "Agrobacterium tumefaciens strain B6 (bacteria)",
    "sample_size": null,
    "outcomes": [
        "Virulence (ability to produce tumors on potato and turnip disks)",
        "Bacterial viability",
        "Ability to attach to a tumor-binding site",
        "Thermal shock (induction)",
        "Reversibility of virulence loss within 12 h"
    ],
    "main_findings": "Exposure to 10,000 MHz microwave radiation at 0.58 mW/cm2 for 30–120 min was associated with a 30–60% decrease in the bacteria’s ability to produce tumors on potato and turnip disks. The exposure did not affect bacterial viability or attachment to a tumor-binding site and did not induce thermal shock; the loss of virulence was reversible within 12 h.",
    "effect_direction": "mixed",
    "limitations": [
        "Sample size not reported in abstract",
        "Mechanistic details not provided in abstract",
        "Exposure metric reported as intensity (mW/cm2) without SAR or dosimetry details beyond frequency/intensity/duration"
    ],
    "evidence_strength": "low",
    "confidence": 0.7800000000000000266453525910037569701671600341796875,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "microwave radiation",
        "10,000 MHz",
        "low-level exposure",
        "Agrobacterium tumefaciens",
        "virulence",
        "tumor formation",
        "non-thermal effects",
        "reversibility"
    ],
    "suggested_hubs": []
}

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AI-extracted fields are generated from the abstract/metadata and may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.

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