Effects of microwave radiation on house dust mites, Dermatophagoides pteronyssinus and Dermatophagoides farinae (Astigmata: Pyroglyphidae).

Abstract

Dermatophagoides pteronyssinus and Dermatophagoides farinae mites are commonly found in house dust, and are important sources of allergens affecting humans. Various approaches to killing the mites have been examined. This study investigated the mortalities of adult mites exposed to 2,450 MHz microwave radiation produced by 3 ovens at various exposure times and power settings. The ovens all had 3 power settings. The average maximum water temperatures generated at high, medium and low power settings were 99.4 +/- 0.2, 84.1 +/- 0.4 and 44.8 +/- 0.9 degrees C, respectively. At high and medium settings, there was 100.0% mortality in both species when exposed for 300 seconds. The mean mortality rates at low power were 10.8 +/- 0.7% for D. pteronyssinus and 9.7 +/- 2.6% for D. farinae. When mites were exposed in the presence of culture media, the mortality rates decreased with increasing weight of media. The mean mortality with the largest amount of media tested at high power setting was 61.4%.

AI evidence extraction

Main findings

Adult mites exposed to 2,450 MHz microwave radiation showed 100% mortality for both species at high and medium power settings when exposed for 300 seconds. At low power, mean mortality was 10.8% (D. pteronyssinus) and 9.7% (D. farinae). In the presence of culture media, mortality decreased as media weight increased; with the largest amount of media tested at high power, mean mortality was 61.4%.

Outcomes measured

• Mite mortality (%)
• Water temperature generated by ovens (°C)
• Effect of presence/weight of culture media on mortality

Limitations

• Sample size not reported in abstract
• Exposure characterization limited to oven power settings and water temperature; no dosimetry (e.g., SAR) reported
• Potential confounding by heating/temperature effects (water temperatures reported)
• Details of experimental setup and controls not provided in abstract

{
    "study_type": "animal",
    "exposure": {
        "band": "microwave",
        "source": "microwave oven",
        "frequency_mhz": 2450,
        "sar_wkg": null,
        "duration": "various exposure times; 300 seconds reported"
    },
    "population": "House dust mites (Dermatophagoides pteronyssinus and Dermatophagoides farinae), adults",
    "sample_size": null,
    "outcomes": [
        "Mite mortality (%)",
        "Water temperature generated by ovens (°C)",
        "Effect of presence/weight of culture media on mortality"
    ],
    "main_findings": "Adult mites exposed to 2,450 MHz microwave radiation showed 100% mortality for both species at high and medium power settings when exposed for 300 seconds. At low power, mean mortality was 10.8% (D. pteronyssinus) and 9.7% (D. farinae). In the presence of culture media, mortality decreased as media weight increased; with the largest amount of media tested at high power, mean mortality was 61.4%.",
    "effect_direction": "harm",
    "limitations": [
        "Sample size not reported in abstract",
        "Exposure characterization limited to oven power settings and water temperature; no dosimetry (e.g., SAR) reported",
        "Potential confounding by heating/temperature effects (water temperatures reported)",
        "Details of experimental setup and controls not provided in abstract"
    ],
    "evidence_strength": "low",
    "confidence": 0.7399999999999999911182158029987476766109466552734375,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "microwave radiation",
        "2450 MHz",
        "microwave oven",
        "Dermatophagoides pteronyssinus",
        "Dermatophagoides farinae",
        "house dust mites",
        "mortality",
        "temperature",
        "culture media"
    ],
    "suggested_hubs": []
}

Comments

Log in to comment.

No comments yet.