and Exposed to Wi-Fi Radiofrequency Electromagnetic Radiation Show Enhanced Growth and Lactic Acid Production.

Abstract

BACKGROUND: and are gram-positive probiotics and members of the genus Lactobacillus. These bacteria are widely applicable in food and dairy industries. Increasing bacterial load and decreasing fermentation time make them more profitable for manufacturers. OBJECTIVE: This study was aimed at assessing the biological effects of short-term exposure of and to 2.4 GHz Wi-Fi radiofrequency electromagnetic fields (RF-EMF) generated by a Wi-Fi router on the lactic acid production and proliferation of these probiotic bacteria. MATERIAL AND METHODS: This experimental study was performed on pure culture strains of and , first direct vat sets (DVS) were activated in MRS broth for 24 hours then transferred to new culture mediums. Afterward, these mediums were exposed to RF-EMF for 15, 30, 45 and 60 minutes. The control samples were sham-exposed. After 72 hours of incubation on MRS agar cell counts were enumerated. RESULTS: Exposure for 30, 45 and 60 minutes significantly increased the growth of and . No difference was found between the growth of the samples exposed to RF-EMF for 15 minutes compared to that of sham-exposed bacteria. In addition, lactic acid concentration in medium was amplified after 15, 30 and 45 minutes of exposure. However, in samples, only 30 and 60 min exposures could stimulate the production of lactic acid. CONCLUSION: and probiotic bacteria exposed for a short time to radiofrequency electromagnetic radiation (RF-EMF) generated by a widely used commercial Wi-Fi router show significantly increased proliferation and lactic acid production.

AI evidence extraction

Main findings

Short-term exposure to 2.4 GHz Wi-Fi router RF-EMF increased growth of both probiotic bacteria at 30, 45, and 60 minutes, with no difference at 15 minutes versus sham. Lactic acid concentration increased in one bacterium after 15, 30, and 45 minutes, while in the other bacterium increases were reported only after 30 and 60 minutes.

Outcomes measured

• Bacterial growth/proliferation (cell counts)
• Lactic acid concentration/production

Limitations

• In vitro study on pure culture strains; findings may not generalize beyond laboratory conditions
• Sample size not reported in abstract
• Exposure characterization beyond frequency/source (e.g., SAR, power density, distance) not reported in abstract

Suggested hubs

• school-wi-fi (0.55)
  Study examines biological effects of 2.4 GHz Wi-Fi router exposure.

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        "source": "wi-fi",
        "frequency_mhz": 2400,
        "sar_wkg": null,
        "duration": "15, 30, 45, 60 minutes"
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    "sample_size": null,
    "outcomes": [
        "Bacterial growth/proliferation (cell counts)",
        "Lactic acid concentration/production"
    ],
    "main_findings": "Short-term exposure to 2.4 GHz Wi-Fi router RF-EMF increased growth of both probiotic bacteria at 30, 45, and 60 minutes, with no difference at 15 minutes versus sham. Lactic acid concentration increased in one bacterium after 15, 30, and 45 minutes, while in the other bacterium increases were reported only after 30 and 60 minutes.",
    "effect_direction": "benefit",
    "limitations": [
        "In vitro study on pure culture strains; findings may not generalize beyond laboratory conditions",
        "Sample size not reported in abstract",
        "Exposure characterization beyond frequency/source (e.g., SAR, power density, distance) not reported in abstract"
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    "evidence_strength": "low",
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    "peer_reviewed_likely": "yes",
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