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Isolation of Soluble and Insoluble PrP Oligomers in the Normal Human Brain
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イギリス (北アイルランドを除く) の変異型CJDの地理的分布
S N Cousens1, L Linsell, P G Smith
1Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, UK.
Lancet (London, England)
|February 19, 1999
まとめ
この研究では,レンダリング工場の近くに住むことと,変異型クレッツフェルト・ヤコブ病 (vCJD) のリスクとの間には,関連性がないことが判明しました. ケント州のvCJD症例のクラスターは,環境曝露によるものではなく,ランダムな出来事だった可能性が高い.
科学分野:
- 神経科学は神経科学である.
- エピデミオロジー エピデミオロジー
- 公衆衛生は公衆衛生である.
背景:
- 変異型クレッツフェルト・ヤコブ病 (vCJD) は,牛のスポンジフォームド脳症候群 (BSE) と同じ病原体を持っています.
- vCJDのヒトへの感染経路は未だ確認されていない.
- 主要な仮説は,肉と骨の粉を生産する化工場を通じてBSEへの曝露を示唆しています.
研究 の 目的:
- 焼却工場の近くがvCJDの危険因子であるという仮説を検証する.
- 焼却工場の住宅地付近がvCJDの発生率と相関するかどうかを判断する.
主な方法:
- 国内CJDの監視ユニットを通じて,CJDに対する事件を特定した.
- 住宅の歴史を収集し,1988年から英国のレンダリング工場を地図化しました.
- 住宅から最も近い溶解工場までの距離を計算し,観察された対予想されたvCJD症例数を比較した.
主要な成果:
- vCJDの症例と,50km以内の溶解工場の近くとの間に有意な関連性は見つかりませんでした.
- ケント州の症例のクラスターが調査され,観測された数は統計的な確率を考慮した後に予想値を大幅に超えていない.
- コンピューターシミュレーションにより,ケント星団は偶然の発見かもしれないことが示されました.
結論:
- 現状の証拠は,住宅地と化工場の近接がvCJDリスクと関連しているという仮説を裏付けていません.
- ケントで観察されたvCJD症例のクラスターは,ランダムな統計的変動に起因する可能性が高い.
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